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.

I (Takumi Kitamura) am a high school student. I happen to find a diary by my classmate Sakura Yamauchi (Minami Hamabe) that reveals she is suffering from a pancreatic disease. I spent time with Sakura, but she dies. 12 years later, due to Sakura’s words, I (Shun Oguri) am now a high school teacher at the same school where I graduated from. While I talk with my student, I remember several months I spent with Sakura. Meanwhile, Kyoko (Keiko Kitagawa), who was Sakura’s friend, is soon to marry. Kyoko also recalls the days she spent with me and Sakura.

10 high school students including Yuka Kabayama are suddenly led to a room and must play the jinrou game. Yuka Kabayama has the jinrou card. She has to hide that fact and the kill players who have the citizens cards one by one. Yuka Kabayama gets excited by her situation.