Oniichan wa Oshimai! (Onimai: I'm Now Your Sister!)

Self-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]

ONIMAI: I'm Now Your Sister!

Lmao - Before HRT I was dealing with head pain everyday. Wi Now, I get breast growth pain instead. Wy Seurce: Oniichan wa Oshimai! (Gnimai: Mow Your Sister!) - iFunny Brazil

Onimai: I'm Now Your Sister (Anime) –

Poster

Oniichan wa Oshimai! / Onimai: I'm Now Your Sister! | Poster

Onii-chan wa Oshimai! (ONIMAI: I'm Now Your Sister!) · AniList

ONIMAI: I'm Now Your Sister! TV Anime Sets January 2023 Release with 1st Trailer - Crunchyroll News

Oniichan wa Oshimai! / Onimai: I'm Now Your Sister! Poster for Sale by BSHA-o-RAHA

ONIMAI: I'm Now Your Sister! Unveils New Trailer, Cast, Staff, and January 5 Debut - QooApp News

BOOK☆WALKER Global:ONIMAI: I'm Now Your Sister! 5 (Oniichan wa Oshimai!) - Manga - BOOK☆WALKER

Imported from Japan and.

Onimai I’m Now Your Sister (Onii-chan wa Oshimai) Blu-ray Box Vol.1 & 2

Oniichan wa Oshimai! Onimai I'm Now Your Sister! Anthology Comic Vol 1N Book

Oniichan wa Oshimai Mahiro Oyama T-shirt Cosplay Costume Onimai I'm Now Your Sister! Men Women T Shirts Summer Tops Tees - AliExpress