Groper Train: Lewd Female in Heat.

Kunimatsu is an old man who has never had a steady job and has devoted his life to molestation. He and his wife, who he met through a sexual relationship, had a daughter who was only two years old, but she died of an illness. His wife also died at the young age of 35. He has no relatives left, and the only person who adores him, a younger brother, is leaving Tokyo and retreating to his wife's countryside home. One day, a girl wearing a red school bag appears before the old man...