Cast: Shiraume Nazuna

The importance of "family" is being forgotten. At an all-girls school, a program to simulate and nurture family ties is carried out. Each student plays the role of father, mother, or child at random. Ayagasaki Kasuga is a girl who has been assigned the role of father in this outrageous project.

There's a new wheel-chair bound student at school who has returned after an illness, and she immediately kisses Tsuzuki Ui, who she calls "Rei-kun." He soon deduces that she is a daughter of a wealthy family, and a person he once beat at an internet murder mystery game. She is apparently fixated on him, since he was the only one who ever beat her, and she has now come to see him in person. Her plan is to have a real-life murder mystery game, and her current focus is on the supposed suicide of Tsuzuki's father. For some reason, she suspects his little sister Haruka...

In order to clear the name of 'Emi,' a girl who had reincarnated as Remilia, the villainess of an otome game, the real Remilia who had been watching all along inside awakens. Now it's time for the true villainess' revenge to begin!