Brave And Undead Are Too Careful

Brave And Undead Are Too Careful (勇者と不死者が慎重すぎる) is a collaboration game event in Mass for the Dead with characters from Overlord and The Hero is Overpowered but Overly Cautious. It was released on September 15, 2020 to October 15, 2020.

Background
During a summoning experiment by a reaction of the Throne of Kings with the Chaos Stones. This time, three goddesses and one hero appeared in front of Momonga. The goddesses should also be careful, but the reaction, behavior, and judgment immediately after the summoning, the brave man was too cautious as Momonga was wary.

Incident
In the Divine Realm, Seiya Ryuuguuin has finished his morning run, stopping at the temple roof where Valkyrie is painting. The hero deciding to take a break, gives Valkyrie the opportunity to draw a sketch of him. She tells him not to move so she can finish her "masterpiece" not wanting a repeat of what happened when Crossed Thanatos destroyed her last painting.

The two are soon joined by Ristarte who is curious to see what they are doing. Seiya claims that he initially wanted to resume training but now is forced to act as an exhibitionist for a talent-less goddess. Ristarte scolds him for saying such language and to bear with it as senior goddess could erase a world. Seiya asks what she is doing at the rooftop, which the goddess claims to be taking a break after trying to do her 'best' when she felt she tried too hard and damaged her skin. Seiya doubts the effort she putted in. The talk annoys Valkyrie who is still trying to paint her picture, telling the interfering goddess to be quiet. A third joins them soon, Adenela who has been seeking Seiya so he can live up to his promise to spend with her on his next visit to the Divine Realm when she helped him against Crossed Thanatos. The hero objects as the deal was that she stopped him and which she failed in doing so. This infuriates Ristarte as he cannot go back on his word.

Valkyrie having enough of the interruption goes in an outburst, when a Crack manifests before the group. While the three deities are confused by the phenomena, Seiya on instinct impales a sword into the ground. The reason for it soon becomes clear when the crack in space begins sucking the goddesses into it. They are grabbed from the air by Seiya who is using the sword to ground himself. Ristarte is surprise by his initiative asks how he could predict such a thing was going to happen, but is given an answer that Seiya did not, and only assumed that the Crack was a threat. Before he could give orders to Valkyrie to use her [Valhalla Gate], a sudden sword slash comes from the Crack and cuts through, damaging Seiya's blade connecting to the ground. Through the Crack, Seiya sees the form of an undead wielding a scythe lurking on the other side. It attacks again with a sword slash and the blade Seiya is holding onto is destroyed, and with it the last support holding the group to the ground. They are sucked through the depths of the Crack in a blink of an eye.

Meanwhile in the Great Tomb of Nazarick, another annual summoning experiment is initiated using Chaos Stones and the remains of the Throng of Kings. The Crack then spits up the three goddess in a heap. Ristarte who was just about to get back on her feet, finds herself used as a cushion by Seiya. Upon landing on his partner the hero is glad to know that the ground is safe as it has yet to dissolve the goddess to the latter's indignation as being used as a foothold to check the environment. The goddess is allowed to get up and survey her surrounding which to her discomfort appears to be in the midst of a flock of undead. Seiya seeing the situation decides to call for a hasty retreat and orders Ristarte to summon a [Gate] to esacpe. A [Gate] portal soon appears in the Throne Room, but before the group can go in, Seiya stops them to check if its safe. Using a pebble he tosses one into the [Gate], only for the portal to spit out the object into Ristarte's face. Seiya out loud wonders why the [Gate] is not working properly and asks his companions if they know or seen anything like the Crack, but they are unable to give him an answer only for Ristarte they might not be in the Divine Realm anymore. The thing they cam through seemed similar to a [Gate], but should not be possible for three goddesses to descend into the world simultaneously.

In an irregular situation, Seiya spots Demiurge and Momonga calmly observing the party. Momonga decides to introduce himself as the ruler of the Great Tomb of Nazarick and offers to answer any questions they have on this strange occurrence. Valkyrie however is not in the mood for listening as seeing their calm demeanor accuses them of being the cause of the Crack that brought her and her friends to this place. Most of all she holds them responsible for destroying her work of art that she painstaking worked on and was lost in the commotion. Finding it unforgivable she prepares to attack, but is stopped by Seiya stating they cannot afford to lose her now. Mistaking this to be a form of declaration of love, the other women swoon at the statement, though Seiya in truth did not want to let their party's strongest member go to waste but lets the women think otherwise so to remain discreet on Valkyrie's power. Seiya calmly assesses the situation they are in, commenting that the ones in front of them might not be responsible. And while they look like undead, this world is not Gaeabrande so in logic undead here might be different in their previous world and possibly not hostile. They should then try to avoid starting hostilities as they might be more powerful than them as this world's laws might just make goddesses vulnerable as they could have instant death magic. Valkyrie seeing his point and pacified by his earlier statement concedes. Momonga watching from afar is surprised how intuitive the young man is as he was just preparing his death magic [Grasp Heart] should the situation turned south. But now that the undead has the strangers undivided attention he then believes he should get to the start and ask how they came to their world.

After sharing information on what they deem acceptable, Seiya and Momonga still regard each other with caution. Though the hero understand that his comrades are in another world, and according to the Overlord, the summoning phenomena that brought them through the Crack was not caused by Momonga to intentionally spirit them away. However it seems that their experiment may have been the trigger of sort for the Crack. Ristarte inquires about the mysterious undead they saw in the Crack which apparently the beings of Nazarick have no idea who that was. Seiya doubts Momonga's truthfulness and considers the possibility of him lying to them. But also brings the possibility that there is another enemy out there that seeks to do them harm from the Crack. He is even more wary of the Overlord as his [Ability Perception] is unable to read the status of the former making him think that Momonga is a similar existence to Crossed Thanatos. Likewise Momonga is wary of the new arrivals with Seiya claiming to be a hero summoned to save a world and that his three female companions are goddesses. Momonga's use of [Life Essence] and [Mana Essence] confirms the women to be of considerable power, but can't exactly measure their HP or MP levels.

Both leaders of the two parties have one thing that they agree on their perspective of the other party: "they're careful". Negotiations begin to determine Seiya and his companions stay within Nazarick. Momonga informs the visitors that the dungeon which they are in is currently kept as a secret to the world and wishes to maintain the secrecy. Seiya has no qualms about that opting for his group to remain in Nazarick until he can confirm the safety outside. For their temporary residence in Nazarick, Momonga request they complete some acts of service for him. Seiya agrees to this, unless all content of the jobs and information are disclosed to them, which includes break times, hazards, and holidays. The two go through careful negotiations so that there is no room for misunderstandings and no missteps while Seiya's group are under the custody of Nazarick.

After some discourse between the two leaders and some suggestions from Demiurge, Seiya's party are granted quarters in the 9th Floor guest room. Ristarte is finally relieved that the talks are done and that they can rest. Valkyrie though believes that making a deal was bad and they could have done better if they broke out. The younger goddess is prone to agree as though the undead were formidable, they pale in comparison to Valkyrie. She is quickly hushed by Seiya with a whack from her head as he is paranoid that the room may be under surveillance. He still uncertain about many things like if the goddesses' immortality are maintained but doesn't wish to take risks to confirm it. After few words from Valkyrie about letting the worries wait until tomorrow, the hero decides to go rest, and begins stripping his clothes. Ristarte misunderstands that Seiya wants to get in bed with Valkyrie and clearly opposes such behavior, covering her own obvious feelings for him on the basis its prohibited for sexual activity between gods and mortals. Adenela is drawn to the conversation and unsheathes her blade to prevent any funny busy. Only Valkyrie is unperturbed by the situation, scolding her companions for their lack of sense and making things weird. Seeing that rest is out of the picture, the hero then decides to train by doing push=ups as the goddesses glare at each other in tension.

The next day the goddesses and hero find themselves in the 6th Floor, which amazes them as they believe that they are outside. Aura Bella Fiora and Mare Bello Fiore appear to act as their guides. Though they appear to be just children, Seiya is cautious warning his friends that since they are Momonga's subordinates they could be beings with powers rivaling a Demon King. Ristarte is shocked that he would go far as to say such things about such cute children, and tries to apologizes to the elves. To her inherent shock the elves comment how keen the young man is, admitting they are as deadly as he believes. Seeing that he has been made valid, Seiya warns his friends that the place around them might be fake with the intent to trap them. Aura interjects stating that while the 6th Floor was an artificial environment it was not constructed to serve as a trap for the likes of them. The time for Chaos Beasts is nearing and is Aura directs them to the forest where the Crack is located. Upon seeing their adversaries, the Chaos Beasts, the goddesses and hero don't know what to make of them. Since he is unable to perceive the stats of the monster with [Ability Perception], he tells Adenla to attack first. To give her encouragement, he tells her that it's because she is "the best" fighter out of all them. Upon hearing the praise, the goddess goes forward and cuts several of the monsters down. Confirming that they can be killed, Seiya then orders Ristarte to prepare for recovery magic an d for Valkyrie to wait in reserve, intending to keep her abilities secret. Valkyrie annoyed that she must retrain herself complies to keep their advantage among their new associates. Seiya then unsheathes his dual blade skills: Double Eternal Sword EX and Phoenix Drive.

The hero completely eliminates all the Chaos Beasts in the attack. Aura observing his abilities comments that even she can't see the limit to his power. Once the monsters are all defeated, all that remains are the Chaos Stones that need to be collected by the Death Knight and the undead minions. Aura announces that the Crack has subsided in releasing Chaos Beasts for the time being and thanks the group for their efforts. The shortness of the battle seems to be a relief, however Seiya believes its not over. He argues that even though the Chaos Beasts have been defeated, leave no corpses save for Chaos Stones, that they could still be alive. In very minute invisible particles, possibly hiding in Nazarick waiting to regenerate at the opportunity. Aura is confused by his logic though it sounds credible as Nazarick still knows very little about the origins of the Chaos Beasts. The twins believe they should report to Momonga on Seiya's theory, but the cautious hero instead opts for another path and proceeds to bombard the forest area with multiple [Hell's Fire] with the intent to eradicate the invisible particles that may or may not exist. The elves are aghast at the inferno that was their territory, unsure Seiya's actions warrants such overkill as there are safe methods of contaminate. Seeing the paranoid human torch their forest, the elves wonder if his actions constitute as an attack on the dungeon. Ristarte afraid of immediate retaliation begs them for forgiveness pleading that Seiya is mentally ill.

In the Round Table Room, Aura and Mare give their report to Momonga, Albedo and Demiurge on Seiya Ryuuguuin's team's progress and arson attempt on the 6th Floor. Aura honestly didn't think that the human had any ill intention to attack Nazarick, but she wondered maybe she should have stopped him. The only reason why she and her brother paused in attacking Seiya was due to his theory that Chaos Beasts could be self-regenerating from small particles even though they vanish and leave behind drops. However after thinking for awhile, the twins deduced that the theory was implausible as Momonga would have already anticipated it and the current security system in Nazarick more than enough to deal with intruders that randomly appear in the dungeon. Momonga though is surprised why he never came up with a theory, as he always assumed the Chaos Beasts were similar to but comes to game mobs but comes to the same reason as the elves that the danger was negligible. The two apologize to prevent Seiya from damaging the forest on the 6th Floor, however Momonga says it doesn;t matter as the fault lies with him for not telling them that the possible dangers about self-regenerating Chaos Beasts. And as for the damage its mostly minor. He wants their report on Seiya and his companions. Aura after using her abilities confirms that the so-called goddesses have greater powers than Seiya, proving her master was right to be cautious. As for Seiya, she and Mare personally find him somewhat cowardly as he made one of his companions fight first to confirm that it was safe to fight the Chaos Beasts. She thinks it has to do with him being the "Hero" that needs stay alive in order to save the world of Gaeabrande. Momonga mentally wonders if that the hero's caution is really based on cowardice, wondering if might stem from something else. His thoughts are disturbed by Aura who asks if he is alright. Momonga states he was merely thinking about the possible damage Seiya could unintentionally cause and then directs his attention to Albedo who he asks if preparations are made to handle the mysterious third party that their visitors encountered when they where sucked in the Crack. Albedo reports that every thing is as prepared to be on the look out for such a individual from the Cracks in Nazarick and for insurance they plan to place surveillance on their guests when they leave for their mission outside of Nazarick. Momonga is pleased to hear this, and tells his followers to be on guard as he suspects Seiya may have intentionally caused the arson to be have his team deliberately transferred outside the dungeon. This in mind careful monitoring of the group is necessary.

The goddesses and hero are brought to the Great Forest of Tob. Valkyrie complains about being assigned to another forest again, but Adenela finds it comforting they are allowed some liberties. Seiya breaking the positive mood, warns the women that this could be a test to see if they escape. Solution Epsilon acting as their guide explains the circumstances of her identity while outside Nazarick and introduces her sister Narberal Gamma who is also present with Slimeko and the protagonist. For this mission Narberal informs them that their activities will not just be limited to hunting Chaos Beasts, but also hunting for for food. For this Ristarte apologizes to their guides for the last item. Prior to the group being sent to the forest, the goddesses and hero had the opportunity to visit the maid cantina where they were in awe at the ludicrous food and area that was comparable to the Divine Realm. However they were forbidden from even eating the food as Seiya believed the food was poisoned. Ristarte objected to his paranoid claims, citing that the other diners showed no ill signs, only for Seiya to be convinced they were immune or taken a prescribed antidote. Even if they prepared their own food in the kitchen, Seiya believed all the materials could not be trusted and neither could Ristarte, as her rice balls could kill people. He was convinced that the food might be poisonous to gods or even humans given the heteromorphic species that lived in Nazarick. The hero even rejects the use of poison healing herbs from Gaeabrande confident that since they were in another world, they would not work. To sustain themselves he offered the goddesses what bits of dried meat he carried.

Back in the present Ristarte complains that the hero used this as a basis for even preventing the women from showering, maintaining a strict belief that the facilities and luxuries were not suited for their kind. Seiya believes it to be insignificant in their survival much to the goddesses annoyance on his lack of hygiene. Slimeko watching the exchange comments to the protagonist that the human is definitely overcautious-ed. The protagonist sees that there is a mark of experience and seemed to be from a psychological trauma. But when the protagonist comments on Seiya's personality as being experience, he is snubbed by a tempered Ristarte. Narberal already disliking the inferiors is then angered at the insult on her colleague. Valkyrie seeing the displeasure on teh other woman's face tries to goad Narberal to say it aloud. Solution quickly intervenes and apologizes on behalf of her sister. Seiya als comes warning Valkyrie to remain calm less they give their hosts a reason to attack them. The tension in the group calms down, though Ristarte wonders how long it could last due to Seiya's uncompromising behavior. To get back on track of hunting for food, Slimeko announces that their prey will be wolves.