Stalking the Sisters: The Voyeur's Duplicate Key

A exploration-focused adventure game about a protagonist named Cameo who moves to the countryside and becomes obsessed with two beautiful sisters, Manaka and Lenka, living in a mansion. After discovering an unlocked door, he steals a spare key and begins placing hidden cameras throughout the mansion to spy on them. The game involves finding hiding spots for cameras within timed exploration segments, selling footage for money, and using earnings to purchase items that will trigger increasingly compromising situations. As the player accumulates surveillance footage and unlocks character profiles, dialogue options open up to interact with the sisters, with multiple endings ranging from romance to coercion and harem scenarios.