Tankōbon Volume 6

Volume 6 (お兄ちゃんはおしまい!⑥, Onii-chan wa Oshimai!⑥) is the sixth tankōbon volume of Onimai: I'm Now Your Sister!. It is a compilation of chapters from Volume 17, Volume 18, Volume 19, and Volume 20 of the doujinshi with added bonus chapters exclusive to this release. It was originally released on April 27, 2022 in Japan, and on October 25, 2022 in North America.