Mahiro Oyama calls himself a "home security guard," but in reality, he hasn't stepped outside in years, holed up in his room playing raunchy dating sims. His shut-in lifestyle worries his brilliant younger sister, Mihari, who decides to take drastic action to snap him out of it. Her solution? A drug that physically transforms Mahiro into a girl-much to his horror. Now stuck in this new body, Mahiro has no choice but to adapt to life as a cute girl, unsure if the change will ever wear off.

ONIMAI: I'm Now Your Sister! - S01
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Overview:
Mahiro Oyama calls himself a "home security guard," but in reality, he hasn't stepped outside in years, holed up in his room playing raunchy dating sims. His shut-in lifestyle worries his brilliant younger sister, Mihari, who decides to take drastic action to snap him out of it. Her solution? A drug that physically transforms Mahiro into a girl-much to his horror. Now stuck in this new body, Mahiro has no choice but to adapt to life as a cute girl, unsure if the change will ever wear off.
Aired:Jan 05, 2023
Duration:24m
Episodes:12
Networks:AT-X
Country: Japan
Seasons (1)
Episodes (12)
1. Mahiro's Confusing New Body2. Mahiro's Time of the Month3. Mahiro's Close Encounter4. Mahiro's New Friend5. Mahiro Discovers Adventure and Social Gatherings6. Mahiro Goes Back to Middle School7. Mahiro's Role-Playing Game8. Mahiro's First Girls Sleepover9. Mahiro Rings in the New Year10. Mahiro Ponders Boobs and Identity11. Mahiro Pretties Up12. Mahiro's Future as a Sister
Characters & Voice Actors

CharacterMahiro Oyama (voice)
Voice ActorMarika Kouno

CharacterMihari Oyama (voice)
Voice ActorKaori Ishihara

CharacterKaede Hozuki (voice)
Voice ActorHisako Kanemoto

CharacterMomiji Hozuki (voice)
Voice ActorMinami Tsuda

CharacterAsahi Ohka (voice)
Voice ActorKana Yuuki

CharacterMiyo Murosaki (voice)
Voice ActorNatsumi Hioka














