Hayasaka Akito is a talented artist. He is working hard to be accepted for the Nika Exhibition, but a tumor is discovered in his heart, and he is told that he has one year left to live. Hayasaka Akito doesn't express his emotions on his diagnosis. One day, on the hospital rooftop, Hayasaka Akito meets Sakurai Haruna, who is painting. Sakurai Haruna tells him that she has only half a year to live. Hayasaka Akito gets attracted to her more and more, but he doesn't tell her about his condition.