With the culture festival over and the world dyed in the Christmas mood, Shirogane recalled the kiss on the clock tower, desperately trying to understand Kaguya's true intentions. Kaguya, on the other hand, gleefully told Hayasaka the events. However, the next day, a shrunken Kaguya appeared in the student council room for some reason. While everyone is concerned, a trial begins inside Kaguya's brain!!