I Guess I Became the Mother of the Great Demon King's 10 Children (Japanese: 異世界で最強魔王の子供達10人のママになっちゃいました。, Hepburn: Isekai de Saikyō Maō no Kodomo-tachi 10-nin no Mama ni Nacchaimashita) is a Japanese manga series written and illustrated by Ema Tōyama.

High school girl Akari mourns the loss of her mother, who shielded her in a hit and run years ago.

Deciding to play an adventure game her mother got her long ago, Akari ended up summoned into it as the prophesied saintess by the demons.

Written and illustrated by Ema Tōyama, I Guess I Became the Mother of the Great Demon King's 10 Children was serialized in Kodansha's shōnen manga magazine Monthly Shōnen Sirius from April 26, 2019,[2][3] to November 25, 2023.

[7] In North America, the manga has been licensed for English digital release by Kodansha USA.