Kimi ga Shinu Made Ato Hyaku NichiKimi ga Shinu Made Ato Hyaku Nichi.

Kimi ga Shinu Made Ato Hyaku Nichi (君が死ぬまであと100日; "100 Days Until You Die") is a Japanese web manga series written and illustrated by Migihara. It was serialized on Shueisha's online platform Manga Mee from November 2018 (and on Shōnen Jump+ from January 2020) to October 2020. The story follows Rintarou Tsuda, a high school student with the ability to see longevity, and Umi Kanzaki, a high school girl with less than 100 days left to live.