Hina from 5th grade has a secret she can't tell anyone: 3 months ago she started having periods. However, one day her childhood friend Daichi found out about it. These are the endless worries of children starting puberty.

She may seem like a beautiful, sophisticated woman! But on the inside, she is just a XXX lady. The more she tries to act like an mature adult in front of younger boys, the more twisted and perverted she gets! A popular love-comedy that has received over 300,000 likes on Twitter.