The main character has a bad home environment, and commute to university from his parents' house where things are flying around in the air. The main character's mother was a so-called hysterical mother who was obsessed with her daughter, who wanted to be constantly monitored by her daughter, due to the influence of growing up in a strict home . Life with such a mother is difficult, and the protagonist runs away from her disgust and meets a senior band member who works part-time at a convenience store. Her senior cares for the crying and troubled protagonist with an angelic smile, and brings her back to his dirty and cramped house to comfort her. Wanting to escape from the shitty reality, the main character becomes more and more dependent on her senpai...