Colette Decides to Die (コレットは死ぬことにした, Koretto wa Shinu Koto ni Shita) is a Japanese manga series written and illustrated by Alto Yukimura.

It was serialized in Hakusensha's shōjo manga magazine Hana to Yume from November 2013 to October 2021.

Written and illustrated by Alto Yukimura, Colette Decides to Die initially began publication as a one-shot in Hakusensha's shōjo manga magazine Hana to Yume on November 5, 2013.

[6][7] In February 2024, Viz Media announced that they licensed the series for English publication in two-in-one volume edition releases.

[8][9] An epilogue manga, titled Colette wa Shinu Koto ni Shita: Megami-hen, was serialized in Hakusensha's The Hana to Yume magazine from January 27 to October 26, 2022.