ONIMAI: I'm Now Your Sister!
Season 1, Episode 12: Mahiro's Future as a Sister
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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.
All Episodes - Season 1
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