Hinata is very affectionate toward her grandfather and loves spending time with him. One day, when Hinata complains of stomach pain, her grandfather begins carefully examining her body. Gradually, his touch turns lewd and sexual. Still a child, Hinata doesn't fully understand what's happening and desperately tries to endure it. On another day, Hinata accidentally breaks her grandfather's precious dish, provoking his anger and resulting in severe punishment. His friend, present at the scene, joins in, and the forbidden acts escalate further, driving the story into deeper darkness.