Ishibuki Toru, a super-motivated guy, is enjoying the rest of his college life after finishing his job hunting...but his lack of morals has earned him the enmity of Mangi Rihito, a hard-nosed junior student with a quirk or two, and it turns out that he is also his neighbor.

One day, a “play” girl comes to his house, and he unwillingly takes emergency refuge in Rihito's room.

However, there...Toru finds an 18 only doujinshi of “tentacles” that Rihito has been wanking over for years...?