A male or female protagonist (teacher, delivery person, childhood friend, online gamer) becomes aware of the hikikomori sister. Initially, they connect with the caregiver sister —but slowly, they are drawn to the withdrawn sister's hidden depth, intelligence, or artistic talent.
The game uses point-and-click mechanics to simulate daily interactions within a confined environment. Point System:
Predators specifically target hikikomori individuals online, knowing they are lonely, financially dependent on family, and unlikely to report abuse. The sister often discovers this too late—or becomes complicit by not wanting to "control" her sister's only emotional outlet.
These points are used as currency to unlock new sexual positions and situational scenarios. Unlocked Actions: