In the spring of his first year of high school, Michiru Takase made a decision: "I'm not going to put any effort into my school life." But the girl sitting next to him is Kasumi Hakanagi. A student surrounded by all kinds of disturbing rumors. With her eyepatch and bandages, she looked every bit the "mentally unstable (menhera)" type, so Michiru tried to keep his distance. But due to an unexpected turn of events, the two end up in a “mutually supportive” relationship.