Tooru Igarashi (Kotaro Koizumi) is a lecturer with charisma, working at a prestigious preparatory school. Recently, he drinks a lot and his life falls apart. Maki Endo (Haruna Kawaguchi) is a student at a part-time high school. Every day, she is exhausted with working multiple jobs to cover her expenses. One day, Tooru and Maki happen to meet each other. Maki wants to graduate high school to get a regular job and asks Tooru to tutor her for her test–retest. After Tooru quit his prep school job, he has lost his pride and passion to teach. Tooru was also diagnosed to have only a year left to live. He decides to teach Maki and get her into the University of Tokyo.
Misaki Sakurai (Mirei Kiritani) has not dated in a long time. She has focused on her work as a pâtissier to eventually run her own business. One day, she gets fired from work. She then meets her first love from high school Chiaki Shibasaki (Shohei Miura). Misaki Sakurai works part-time at Chiaki’s restaurant and also stays there. While she lives with Chiaki at his restaurant, she realizes that Chiaki's two younger brothers Toma (Shuhei Nomura) and Kanata (Kento Yamazaki) also live there.