Naho Takamiya is a 2nd year high school student. During the spring, Naho Takamiya receives a letter sent by herself from 10 years in the future. In the letter, she liked transfer student Kakeru Naruse. Kakeru Naruse carried emotional scars from his mother’s suicide and he died one year later. 26-years-old Naho Takamiya thinks about Kakeru Naruse often. 2nd year high school student Naho Takamiya, with the knowledge of what she feels 10 years in the future, takes action to change her future.

Tsuchida works at a host club in secret to support her live-in boyfriend Seiichi, in order to fulfill his dream of becoming a musician. Seiichi is unemployed and falls into a slump, unable to write any songs. However, when Seiichi learns that Tsuchida became a mistress of a customer at the host club and that it was how she is earning their living expenses, he changes his mind and decides to find a job. Meanwhile,Tsuchida had an accidental reunion with Hagio, an old lover who she has been unable to forget.