A series in which an older sister who once wore bloomers in physical education when she was a student confesses her erotic acts at the time.
This time, Mihina-chan, a graceful but sensitive girl with hips of 95cm.
In physical education, she said she wore bloomers until the 5th grade of elementary school, after which she changed to shoot pants.
During her bloomers days, she talks about the sexual acts she secretly performed while immersing herself in bloomers play.
