Miyo-chan is a classmate of Mahiro in middle school. She is friends with Mahiro and Asahi. Miyo-chan is somewhat quiet and shy, and many times does not express herself verbally. However, she likes to hug and embrace her girl school friends, and takes a great interest in them and their activities.

She has become particularly interested in Mahiro, although she is younger then her by a couple of years. Miyo-chan seems to be socially interested only in girls, and limits her time and attention to only select girls.

She gives the appearance of showing her love and affection as a Shoujo Ai or Yuri shipping (girl with girl relationships). As such, Miyo-chan is always quick to ascribe a Yuri motive to any two girls talking or playing around with one another, as she likes to watch, on the side, such social interplay. But when another girl interacts or shows an interest in her, Miyo-chan, she is also quick to assign a Yuri motive, where in reality, no such Yuri shipping probably exists.

Mahiro Oyama was just a normal erotic-game loving dude…until he woke up one morning as a woman! Turns out his mad-scientist little sister, Mihari, tried out one of her new experiments on him…with a disastrous outcome, as far as Mahiro’s concerned! But Mihari is as determined to study him as he is determined to go back to his shut-in, game-playing life, and one thing’s for sure…life is going to get a whole lot weirder from here on out!
 
(Source: Kodansha USA)
 
Note: Includes 57 extra chapters.

Mahiro Oyama was just a normal erotic-game loving dude…until he woke up one morning as a woman! Turns out his mad-scientist little sister, Mihari, tried out one of her new experiments on him…with a disastrous outcome, as far as Mahiro’s concerned! But Mihari is as determined to study him as he is determined to go back to his shut-in, game-playing life, and one thing’s for sure…life is going to get a whole lot weirder from here on out! 
 
(Source: Kodansha USA)

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An anthology comic of Onii-chan wa Oshimai! by various mangaka.

Includes: 
1) まひろちゃんお誕生日会場 (2022 March 6) 
2) みはりちゃんお誕生日会場 (2022 April 22) 
3) あさひお誕生日会場 (2022 May 5) 
4) みよちゃんお誕生日会場 (2022 June 18) 
5) かえでちゃんお誕生日会場 (2022 September 12) 
6) もみじお誕生日会場 (2022 October 20) 
7) なゆたんお誕生日会場 (2022 November 23) 
8) まひろちゃんお誕生日会場 2023 (2023 March 6) 
9) みはりちゃんお誕生日会場2023 (2023 April 22)

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!.

Miyo Murosaki