Why Can't We Stay as Children?

Vol.1 Chapter 3: Is it wrong to get rid of these panties?
Vol.1 Chapter 2: Why boys can't get in?
Vol.1 Chapter 2: Why boys can't get in?
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.
Related Series