Since I Could Die Tomorrow (あした死ぬには、, Ashita Shinu ni wa) is a Japanese manga series written and illustrated by Sumako Kari.

Written and illustrated by Sumako Kari, Since I Could Die Tomorrow was serialized on Ohta Publishing's Ohta Web Comic website from March 28, 2018 to July 28, 2022.

[1][2] Its chapters were collected into four wideban volumes released from June 13, 2019 to October 14, 2022.

[5] The series was ranked third in the 2020 edition of Takarajimasha's Kono Manga ga Sugoi!

[12] The series won an Excellence Award at the 23rd Japan Media Arts Festival.