Season 1

When 23-year-old Hirose Anna finds out that her little brother masturbates with her dirty underwear, she decides to take things a step further by allowing him to see her do naughty things as well. Each time the situations escalate until she comes out and tells him that as his big sister she will take responsibility for his sexual curiosity. She allows him to do anything with her except for proper sex; yet as his requests get dirtier each time, she remains determined to take responsibility and keep things going no matter what.

Episodes

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Episode 12012-02-17

OVA: The Elder Sister's Free Oral Day

When 23 year old Hirose Anna finds out that her little brother masturbates to her dirty underwear, she decides to be a step ahead of him: she chooses to allow him to see her naughty side, and escalates her actions each time. Eventually, she comes out and tells him she will take care of his sexual curiosity as his older sister: she will allow him to do anything, except vaginal intercourse, and while his requests get dirtier each time, she takes responsibility as his older sister, stands by her word, and keeps going.

Season Cast

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Cast

Natsume Yusura

Hirose Anna (voice)

Season Media

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Posters

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