The high school boy protagonist turns to his childhood friend and neighbor Rio who's a university student, to help him study for his college entrance exams. Note: the untranslated oneshot "Open Family" is not a...

Kagidou-san became his personal love-slave, but how did this happen and more importantly, what will happen to her in the future?

Set in the same setting, this story follows a student who catches Kagitou and Nanase (main characters from the prequel) on the school roof and two girls who end up having a somewhat similar relationship with...