I handed the key to the student, and during the summer vacation, she and I, as a teacher, began a forbidden cohabitation that was wildly passionate. (Ono Rikka MIDA-535)

[A forbidden love story between a female student and her teacher] Forced by her unrequited love, Rikka, she hands over the key—and that's how it begins. For a month during summer vacation, Rikka goes to her teacher's house every day, practically living together. They make hamburgers together, squeeze into a cramped bathtub, and make love every single day. Their fragile, sorrowful, and sweet sensual cohabitation is something they can't tell anyone, knowing it will eventually end.