Koigakubo-kun Stole My First Time (恋ヶ窪くんにはじめてを奪われました, Koigakubo-kun ni Hajimete o Ubawaremashita) is a Japanese manga series written and illustrated by Rin Miasa.

It began serialization on Kodansha's Pixiv-based Palcy website and app in March 2021.

Written and illustrated by Rin Miasa, Koigakubo-kun Stole My First Time began serialization on Kodansha's Pixiv-based Palcy website and app on March 30, 2021.

[3] The series is licensed digitally in North America by Kodansha USA.

[4] The series, alongside Bride of the Barrier Master, won the Women's Comic Prize at the 2024 Electronic Manga Award held by NTT Solmare.