Hisashi Tanaka is a medical student in Hokkaido Prefecture, Japan. He does volunteer work and gets to know Yasuaki Kano at the hospital. Yasuaki Kano has suffered from muscular dystrophy since he was 12-years-old. Yasuaki Kano has his eccentric ways like running out of the hospital and saying that he wants to eat a banana late at night. Hisashi Tanaka thinks Yasuaki Kano is a lovely person. Yasuaki Kano develops a crush on rookie volunteer Misaki Ando. He asks Hisashi Tanaka to write a love letter for him, but Misaki Ando is Hisashi Tanaka’s girlfriend.