Albedo and Shalltear Bloodfallen, who are wearing school uniforms, are fighting over a button and draw the attention of Ainz Ooal Gown. He is bewildered by the argument until Demiurge and Yuri Alpha arrive, also wearing school uniforms further confusing Ainz. Demiurge then explains that he recently found a notebook in one of the Supreme Beings' rooms. The notebook illustrates a story of a handsome man being fought over by ladies for his second button.
The two Floor Guardians, inspired by the story strive to reenact the story and asked Demiurge and Yuri to participate. Demiurge asks Ainz if he would participate with Yuri offering him a uniform of his own to wear.
Dismayed, Ainz plans to end this insanity only to see the long faces of Albedo and Shalltear. Now terrified of disappointing them, he attempts to avoid being part of it, stating that the uniform may not fit. However the women happily reply they prepared two separate uniforms for him, Shalltear's being white while Albedo's being black. The two then argue which dress uniform should Ainz wear though in the end both respect each other's argument and wish to see Ainz wear both.
Having enough Ainz takes the uniform in Yuri's hand. He then tells Mare to come over and gives him the second button, to the shock of the women. Ainz tells them not to misunderstand stating that each will get a chance to possess it in the following years. Though disappointed, Albedo and Shalltear look forward to next year to win Ainz's affection. Demiurge and Yuri break into tears in resolving such a situation.
Afterwards the event is created on Nazarick's calendar as a festival called the Graduation Ceremony in which the second button will be granted to the most outstanding Guardian.
- In Japanese Middle/High School culture, the uniforms' second button is the one closest to the boy's heart. If given to a girl he loves it symbolizes giving his heart away.