Steel Butler and the Darkness of the Black Market

Steel Butler and the Darkness of the Black Market (鋼の執事と闇市の闇) is a game event in Mass for the Dead that will be released on October 12, 2020 to October 22, 2020.

Background
Sebas Tian may be "a traitor"...Upon receiving the report, Momonga orders a survey of the brothel in the black market of E-Rantel, where Sebas enters and exits. Sebas, who had no way of knowing that, was conducting another investigation for one personal motive.

Incident
Solution Epsilon having returned from E-Rantel requested a private meeting with Momonga and Albedo. The request was sudden causing Momonga to hastily adjust his schedule which Solution apologizes but she has a report that she feels he must hear. When Momonga asks what did she want to discuss, the Pleiades maid is apprehensive on the subject. Her hesitation annoys Albedo, thinking that the maid is wasting their master's time. Momonga tells her to cease as Solution work has been vital and display nothing but loyalty to him. Albedo knowing she misspoke apologizes to her master. Momonga then asks Soluion to speak freely. Knowing that Solution would only approach him if the situation was dire, Momonga wonders if perhaps that she wishes to report that Nazarick has been discover. If that is the case, it won't be a fatal problem but if its in part due to Solution failure that would be another story and he might have to find a way to avoid punishing her. When the maid begins her report concerning a "superior", the Overlord worries that she is talking about the protagonist. It is of course about Sebas Tian, which Momonga states that given their assignments its natural that they would have limited opportunities to work together, but the maid drops the bombshell on him when she reveals that she fears that Sebas Tian may have betrayed them to his confusion.