I decided to destroy my boyfriend. High school student Kitabayashi Sho had a problem. Since childhood, he has had a sudden "destructive urge" that makes him want to destroy something inside him. Terrified of this, and knowing that he will ruin his life if he continues like this, Sho decides to fulfill this desire just once. One day, he happens to walk into an old stationery store in town. He meets the older, gentle-mannered owner, Hotaru Jiro, and makes a decision. "I'll go with this guy."