Before meeting each other, both leads have this thing in common: they couldn't dream about the future, getting ready to die was something they couldn't stop thinking about. Matsuri knew she wouldn't live more than 10 years, Kazu had 0 reasons to be alive.

After getting closer, their lives changed, Kazu realized life could be beautiful, his life that until this time was monochrome , finally became colorful, falling in love changed his mindset, and even after getting rejected by the girl he loved so much he couldnt step back, now even if she couldnt accept his feelings, Kazu found another reason to live, he wanted to stay by Matsuri side and help her pass through those hard times, he thought someday she would be cured.

But for Matsuri, it was painful, when she first heard about her ilness she couldn't cry, seeing her family crying made her feel like she needed to be stronger than everyone, so with the thoughts of "there's nothing i can do about it" she denied her feels, denied her pain. But everything changed when she experienced the feeling of falling in love, spending her last
years with the one she loved made her finally realize how much she would be missing when her death time comes.