Izumi's cousin, Irabu Yuu, was exhausted by the relationships centered around his aunt, and by the time he entered high school, he was completely twisted. Realizing that he was not suitable for interacting with people, Irabu was supposed to spend an isolated year and spend the remaining two years alone. However, for some reason Irabu's frustration peaked when he was entwined by a person named Makube Suguru who was with him after changing classes in high school 2?!..