[JUKF-067] My brother is my onapet, Momoka Kato, Momoka Kato (Censored)

A girl who is curious about naughty things rather than studying, Noka-chan, who stays at home all the time, is peeping at the place where her sister is masturbating and the place where she is having sex with her boyfriend There is. One day, a perverted brother sneaks into Noka-chan's room and goes night night ● I failed, and on that day the power relationship reversed and the idiot brother who turned into a servant is a younger sister like a daily routine Since then, he has been treated as a butter dog. Either way, I wonder if this older brother has this younger sister.