Yamaguchi-kun Isn't So Bad

Yamaguchi-kun Isn't So Bad (山口くんはワルくない) is a Japanese manga series written and illustrated by Yuu Saiki. It has been serialized in Kodansha's manga magazine Bessatsu Friend since September 2019.

Publication
Written and illustrated by Yuu Saiki, Yamaguchi-kun Isn't So Bad started in Kodansha's manga magazine Bessatsu Friend on September 13, 2019. The manga went on hiatus in June 2022 due to Saiki's childbirth, and resumed on July 13, 2023. Kodansha has collected its chapters into individual volumes. The first volume was released on January 10, 2020. As of July 11, 2024, nine volumes have been released.

In July 2021, Kodansha USA announced that they have licensed the manga for English digital release in North America.

Reception
The series was among the top five manga in the women's category of Comic Seymour's Electronic Comic Awards 2022.