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Season 1 Jan. 05, 2023
- Episode 1: Mahiro's Confusing New Body
- Episode 2: Mahiro's Time of the Month
- Episode 3: Mahiro's Close Encounter
- Episode 4: Mahiro's New Friend
- Episode 5: Mahiro Discovers Adventure and Social Gatherings
- Episode 6: Mahiro Goes Back to Middle School
- Episode 7: Mahiro's Role-Playing Game
- Episode 8: Mahiro's First Girls Sleepover
- Episode 9: Mahiro Rings in the New Year
- Episode 10: Mahiro Ponders Boobs and Identity
- Episode 11: Mahiro Pretties Up
- Episode 12: Mahiro's Future as a Sister
ONIMAI: I’m Now Your Sister! Season 1 Episode 12
Mahiro and the girls take a trip to a Japanese inn over spring break. First they hit the town in their yukata, before heading to the open-air bath to detox. However, things go south when Mahiro begins to feel a familar tingling sensation between his legs.