Nanaka and Hodaka have been childhood friends since kindergarten, and now that they are university students, they share a room and engage in SM-style sex.

One day, Nanaka is told by his coworker Sawa that his relationship with Hodaka is just "friends with benefits," which makes him feel uneasy. This is because Hodaka confessed his feelings to him at their middle school graduation ceremony, and in fact Nanaka also likes Hodaka.

However, for certain reasons, Nanaka was unable to accept Hodaka's feelings at the time, and now they are only connected through their mutual hobby of SM play. Then, he meets Tateishi, who has feelings for Sawa, and he asks him for advice: "I want us to fake a relationship to make Sawa fall in love with me"...