Groper Train: Butt Boasting

Original title: 痴漢電車 お尻自慢

High school student Miruku lives with her bedridden grandfather on the countryside, and dreams of becoming a dancer. After some money goes missing at dance practice and Miruku's role in the group is compromised, her grandfather tells her about her mother, herself a famous dancer, and Miruku decides to go and find her in Tokyo.