ONIMAI: I'm Now Your Sister!

Overview
Mahiro Oyama, a laid-back gamer with a penchant for erotic titles, finds his life upended when his younger sister, a scientist, accidentally turns him into a girl. Initially desperate to revert to his former self, he gradually realizes that this unexpected transformation presents a unique chance for personal growth. As he navigates his new identity, Mahiro begins to explore the possibilities of a different life, prompting him to reconsider his priorities and ambitions in a quirky, heartwarming journey of self-discovery and adaptation.
Episodes
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4

Mahiro's New Friend
After losing a video game to Mihari, Mahiro faces the dreaded task of grocery shopping as his punishment. As a reclusive, unemployed young man, he fi...
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5

Mahiro Discovers Adventure and Social Gatherings
One morning, Mihari is pleasantly surprised to find Mahiro awake before her. Excited about the corner store's release of clear files from his favorite...
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6

Mahiro Goes Back to Middle School
One day, Mahiro is visited by Momiji, who arrives with her friends, Asahi Ohka and Miyo Murosaki. They have come to extend an invitation to Mahiro to ...
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7

Mahiro's Role-Playing Game
As Mahiro starts to settle back into the rhythm of middle school, the pressure of final exams looms large. Initially indifferent, he soon finds himse...
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8

Mahiro's First Girls Sleepover
As winter break arrives, Mahiro eagerly anticipates his time off from school. Little does he know, Mihari has arranged a surprise sleepover with Momi...
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9

Mahiro Rings in the New Year
During Christmas, Mahiro is taken aback to discover that his younger sister has a date. Troubled by this revelation, he decides to stealthily track h...
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11

Mahiro Pretties Up
At school, horoscopes have become the latest trend, sparking Mahiro's interest in discovering their significance. His reading hints at an upcoming eve...
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12

Mahiro's Future as a Sister
During their spring break, Mahiro and the girls visit a traditional Japanese inn. They start their adventure by exploring the town while wearing yukat...