Kosaka, a guy in a band who enjoys casual relationships like friends with benefits, and Toraji, a hairstylist who gets dumped by women all the time because he's clingy, have known each other for many years and are friends who get along weirdly well. One day, Toraji suddenly shows up at Kosaka's FWB's house when they're making out. However, Toraji's head over heels for that FWB and had never touched her because of his strong feelings for her. After a night of drinking away his feelings, Toraji furiously tells Kosaka, "If I sleep with you, then it's like I've slept with her," and forces him to spend the night with him. However, they both enjoyed the sex more than expected. They know that falling in love will only end up causing trouble for both of them, but they end up wanting it again and again...! How could a one-night stand born from a love triangle end up being so unforgettable? This is a serious romance between two difficult men, a controlling hairstylist and a slutty band member!