The students at “Matrimony Academy” are all engaged couples. One day, Maruo the student council secretary’s fiancée Nadeko asks him for a favor. “...May I ask you to sleep over tonight?” They end up alone together in Nadeko’s room, and she proceeds to reveal her secret...

With the help of “Sploosh,” a performance enhancer, Nikita and Santaro move forward with their relationship, all according to the academy’s ultimate plan.

A new dormitory has been built within Matrimony Academy, and it’s the student council’s duty to conduct an inspection!