Hidden Under the Kotatsu with Sister

A sexual fantasy game set in a family home. The protagonist is suddenly aroused while spending time with family and decides to engage in sexual activity with his younger sister. Despite their parents being present and watching television nearby, he proceeds with the act under a kotatsu (heated blanket table), driven by the thrill and taboo nature of the situation. The game explores forbidden family dynamics and the tension of sexual activity in a public family setting.