Minato, one of the boys' duo, dresses up as a woman in this side story. *Note: Released at Comiket 103, 105 and 107.*

I have a massive crush on my classmate, Takase Narumi. My dream is for her to become friends with my shy, introverted twin sister, Kotomi, too, so that we can all live happy ever after in the same class. However, there's one problem: Takase’s best friend, Momoi Maho, a blonde half-Japanese gyaru and online celebrity, who is a beautiful girl, but also famous for hating boys. She treats me coldly, too, but I was hoping she can at least get along with my sister… One day, my sister asks me for a favor. She's nervous about meeting her online game waifu in person and she wants me to go in her place. I agreed to help her out, but to my surprise, the person waiting for me at the meetup was none other than Momoi Maho—!? (Source: Dash Bunko, translated)

An anthology about cats, by authors who own cats.

*Note: Originally published in Galette issue 19.*

A manga essay depicting Nekojiru's life where she drew herself as a cat. *Note: Includes one bonus chapter*

Specials chapters of Onii-chan wa Oshimai! bundled with the mini dramas CD sold during Comic Market.

A booklet bundled with the *Onii-chan wa Oshimai!* volume 7 special edition.

Special manga drawn for the Blu-Ray release of the anime Onii-chan wa Oshimai!.

Anthology for Demi-chan wa Kataritai