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Rin Nakajo, the president of the school, is a childhood friend who has attended the same kenjutsu dojo since childhood.
He is often challenged to a game in which he promises to do as he pleases for a week, and he wins.
He gives her a light naughty order as punishment, and it turns out that he has feelings for both of them!
The reserved and cool Rin, who is strictly forbidden from eroticism, is turned into a sweet and erotic dirty girl by the erotic commands!
