Mahiro's Cosplay Round-Table

Mahiro's Cosplay Round-Table (まひろとコスプレ談義, Mahiro To Kosupure Dangi) is a bonus chapter of Onimai: I'm Now Your Sister!. It was originally published exclusively in Volume 7 of the manga which was released on January 7, 2023 in Japan, and July 25, 2023 in North America.

Summary
Mahiro and her friends have a discussion about cosplay.

Characters

 * Mahiro Oyama
 * Mihari Oyama
 * Kaede Hozuki
 * Momiji Hozuki
 * Asahi Ōka
 * Miyo Murosaki
 * Nayuta Tenkawa
 * Mari Nishinomiya

Trivia
商业版漫画第七卷附录漫画