To become close to classmate Kaori Fujimiya (Haruna Kawaguchi), Yuki Hase (Kento Yamazaki) wants to get to know her. She always goes alone. To avoid getting close to Yuki Hase, Kaori Fujimiya doesn't want to get to know her because she forgets her friends on every new Monday. As even though Kaori tells Yuki why she doesn't want to be friends with her, Yuki wants to be close to her.