Tankōbon Volume 1

Volume 1 (お兄ちゃんはおしまい!①, Onii-chan wa Oshimai!①) is the first tankōbon volume of Onimai: I'm Now Your Sister!. It is a compilation of chapters from Volume 1, Volume 2, Volume 3, and Volume 4 of the doujinshi with added bonus chapters exclusive to this release. It was originally released on June 27, 2018 in Japan, and on August 31, 2021 in North America.

Chapters[]


Volume	No.	Title
Volume 1	1	Mahiro's Confusing New Body
	1.5	Mahiro and the Bathroom
	2	Mahiro Faces the Mirror
	3	Mahiro's Self Image
Volume 2	4	Mahiro Plays an MMO
	5	Mahiro's Melancholy Day
	5.5	Mahiro, Even On Heavy Days
	6	Mahiro and the Secret Garden
	6.5	Mihari's Wasted Efforts
Volume 3	7	Mahiro's Unexpected Encounter
Volume 3	8	Mahiro Starts Over
Volume 4	8.5	Mahiro and the Gatcha Game
Volume 3	9	Mahiro and the Girls' Day Out
Volume 3	9.5	Mahiro and Kaede's Secret
Volume 4	10	Mahiro the Own-Home Security Guard
N/A	10.5	Mahiro Helps Out
N/A	Bonus	Mihari and Her Onii-Chan

Trivia[]

The Official English Translation of the manga gives the name of Chapter 9.5 as this chapter as "Mahiro and Keade's Secret" officially, but lists it is "Mahiro and the Secret" in the table of contents.

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Manga
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EX Specials		EX Special • EX2 Special • EX3 Special
Spin-off Doujinshi		Good Night Onii-chan! • Mihari-chan in the Laboratory • Onimai Side Reader: Mihari's Laboratory
Minato-kun is Done For?		1 • 1.5 • 2
Anthology		1 • 2 • 3 • 4 • 5
Drama CDs		Drama CD • C95 Mini Drama CD • Drama CD 2 • C97 Mini Drama CD • C98 Drama CD • Drama CD EX • Tankōbon Volume 8 Drama CD • Tankōbon Volume 9 Drama CD
Other Series		Niwasaki Diary • Idol Stuff
Songs		From Here