8 : Mahiro's First Girls Sleepover
It`s finally winter break and Mahiro is excited to get into his Winter Vacation Mode. Unbeknownst to him, however, Mihari invites Momiji and the others over for a sleepover. She hopes this will prevent a potential relapse into his old, shut-in ways.
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DiscordSelf-professed "home security guard" Mahiro Oyama has not left his home in years, secluding himself in his room playing erotic visual novels. This depraved lifestyle causes his prodigious sister, Mihari, to worry about his well-being. In hopes of solving this problem, she devises a plan to rehabilitate him back to normalcy.
The first part of Mihari's plan is to concoct a medicine that changes her brother's biological constitution into a bona fide female, much to Mahiro's vehement dismay. Stuck in this predicament, Mahiro has no choice but to live out his life as a cute girl until the effect wears off—if it ever does.
[Written by MAL Rewrite]
23 min per ep9 : Mahiro Rings In the New YearOniichan wa Oshimai!4093views •- 23 min per ep10 : Mahiro Ponders Boobs and IdentityOniichan wa Oshimai!3406views •
- 23 min per ep11 : Mahiro Pretties UpOniichan wa Oshimai!3392views •
- 23 min per ep12 : Mahiro's Future as a SisterOniichan wa Oshimai!3389views •
