HMN-433: The uncle who molested a tram during his student days and his mother remarried. From that day on, he was treated as a obedient uniformed pet every day... Ai Nenose.

The female protagonist, Nonose Ai, was once molested by a train pervert during her student days. Years later, that perverted old man becomes her stepfather. From that day on, her life completely falls into ruin. She is treated as an obedient uniform creampie pet every day, forced to wear a student uniform and toyed with by her stepfather. The perverted old man uses his past secrets and authority to train her into a submissive sex slave, repeatedly creampie-raping her, sinking into forbidden pleasure from which she cannot extricate herself.