When Ninon found out that her neighbor and popular classmate Yuji only has one year to live. She decided to go out of her way and help him attain happiness on his remaining time.
Ninon Okamura and Yuiji Kira live next door to each other, but they have not talked with each other at school. Ninon Okamura learns from her parents that Yuji only has a year to live. One day, Yuiji Kira tells Ninon Okamura that he doesn't want to die and he doesn't to be alone. Ninon Okamura tells him that she will be by his side until he dies.