Yumi no Fantasy

It starts small: Yumi turns her favorite idol into fantasy material during masturbation, and that one habit doesn't stay contained. She's an otaku girl with an online obsession, and the more she leans on him as a mental escape, the more her ordinary life bends out of shape around it.

The setup is simple corruption-by-degrees. There's no external villain forcing anything on her, just her own habit deepening until it starts rewriting how she spends her days and what she's willing to do to keep chasing that fantasy.

Play follows her slide from private daydream into physical acts, spanning masturbation, sex work, and encounters that build on each other as her dependence grows. It's a character study told through escalating scenes rather than branching choices, so the pull of the game is watching how far one obsession can drag an otherwise normal girl.