Bug Ego (Japanese: バグエゴ, Hepburn: Bagu Ego) is a Japanese manga series written by One and illustrated by Kiyoto Shitara.

First published for two chapters in Young Jump Dai Ichiwa—a supplement magazine of Shueisha's seinen manga magazine Weekly Young Jump—in April 2023 and January 2024, the manga began a regular serialization in the publisher's Ultra Jump magazine in October 2024.

Written by One and illustrated by Kiyoto Shitara, Bug Ego was first published in Shueisha's Weekly Young Jump's supplement magazine Young Jump Dai Ichiwa (Young Jump Chapter One) on April 27, 2023;[2] the magazine features "first chapters" of potential manga series, allowing readers to vote on which ones should be serialized in the main magazine, and while Bug Ego was not part of that contest, a "first chapter" was published in the supplement magazine.

[3][4] The manga started a regular serialization in the publisher's Ultra Jump magazine on October 19, 2024.

[5][6] In North America, Viz Media started publishing the manga digitally on its Shonen Jump service on November 18, 2024.