Nacchan, who lost her parents, is taken in by her uncle, her father's older brother. She had met the uncle when she was little, but this is the first time they've met in a long time. With no parents or friends to protect her, Nacchan is sexually assaulted by her uncle all over the house. Poor Nacchan. But it's because she's so pitiful that it makes her cum. Nacchan is honestly quite erotic as her uncle's thick semen is poured steadily into her mouth. This is the story of how a shy, helpless girl is made to grow up with semen.