Onee-chan to Boku

A young boy lives with his older sister, who takes care of him. Their daily life is filled with quiet moments and simple routines, but the bond between them hides a deeper, more intimate connection. As they spend time together, the line between sibling affection and something more begins to blur.

The boy finds himself increasingly drawn to his sister in ways that go beyond familial love. She, in turn, responds to his advances, leading them into a secret relationship that defies societal norms. Their hidden desires slowly unravel, transforming their shared home into a space of forbidden passion.