Mahiro and the Terrifying Secret Room

Mahiro and the Terrifying Secret Room (まひろと恐怖の密室, Mahiro To Kyōfu No Misshitsu) is Chapter 11 of the Onimai: I'm Now Your Sister! anthology series. It is written and illustrated by Kometsubu. It was originally published as part of Volume 1 of the anthology series on May 27, 2021.

Summary[]

Mahiro and Mihari become trapped in an elevator on a hot day while buying swimsuits.

Plot[]

Characters[]

Trivia[]

This chapter is written and illustrated by Kometsubu.

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Collected Works Special Chapters		Real Record! Drama CD Report • Mahiro and the After-Travel Party • Mahiro and a Sleepy Day • Mahiro's Weekday Routine • Mahiro and the Visible Undergarmets • 2020 Summer Special Brochure • Mahiro and the Harem • Mahiro and After the Festival • The Boys Are Done For!
Tankōbon Bonus Chapters		Mihari and Her Onii-Chan • Mihari's Wardrobe • Mihari's Wardrobe Afterwards • Miyo's Refusal • Asahi's Innocence • Momiji's Nickname • Kaede's Concern • Mahiro's Lunch • Mihari's Lunch • Asahi and Momiji • Mihari's Skipped Grades • Nayuta's Recent Past • Mahiro and the Photo Albums • Mahiro's Cosplay Round-Table • Mahiro and the Ko-Gal Squad • TBA
Tankōbon Special Chapters		Mahiro's Colorful Life • Mahiro's Anime Time • Miyo and the Enchanted Night • Asahi and Nii-chan • Perfect Onee-chan • Mihari's Research Lab • TBA
EX Special Chapters		Mahiro and the Uneventful Holiday • Later in the Lab • Mahiro is Me and Mihari is Me • Mahiro in a Close Call
Spin-off Special Chapters		A Story Where That Grows • Mihari and the Drinking Party • A Story Where That Grows Part 2
Minato-kun is Done For? Chapters		Minato-kun is Done For? • Offline Meeting Night • Minato-kun is Done For? 1.5 • Minato-kun is Done For? 2
Blu-ray Special Appendix Chapters		Blu-ray Volume 1 Appendix Manga • Blu-ray Volume 2 Appendix Manga
Drama CD Audio Chapters		1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15
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Idol Stuff		1 • 2
Niwasaki Diary		1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11