"Story of a Kōhai Annoyed by Her Senpai") is a Japanese romantic comedy manga series by Shiro Manta.

It has been serialized online via Ichijinsha's Comic POOL digital manga magazine from 2017 to July 2024 and has been collected in twelve tankōbon volumes.

Futaba Igarashi, a diminutive and scrappy office worker who is often mistaken for a child, constantly complains about her big and boisterous coworker, Harumi Takeda.

[4][a] Tomori Kusunoki, Saori Hayami, Reina Aoyama, and Aoi Koga performed the opening theme "Annoying!

", while Yui Horie performed the ending theme "Niji ga Kakaru made no Hanashi" ("The Story Across the Rainbow").