Shiho-chan has no Privacy

A part-timer named Nobuo Sato spots a female student in the park on his way home from work, follows her to find out where she lives, and starts building a plan around her. That plan is the whole game: Shiho Monobe's life stops being her own from there.

Nobuo tracks her routines and closes in on her over time, moving from watching to acting as opportunities present themselves. The game runs as a sandbox around this stalking, so you're managing his approach and her schedule rather than clicking through a fixed script.

This is a quiet, predatory setup rather than a story with twists, told from the stalker's side throughout.