Sister's Masturbation Game

This is an adult interactive visual novel and touch simulation game featuring a character named Yuuha, your younger sister. The core mechanic involves touching and interacting with the character through a button-press interface, gradually increasing her lewdness over time based on player choices and repeated actions. As players engage with various sexual activities, new interactions and dialogue unlock, and the character's personality and responses evolve. The game includes multiple sexual scenario types with adjustable pacing and cumshot timing control, along with a free-touch mode that unlocks all content from the start. The narrative begins when the player character discovers his sister masturbating and proposes a mutually beneficial arrangement.