My niece, Ichika-chan, came to stay at Yamada's house, a freeter who only thinks about her butt. Ichika doesn't listen to people, she just plays games all day long. Ichika-chan exposes her beautiful butt defenselessly. Yamada can't stand it and buries her face in Ichika's butt... She was surprised at the sudden act at first, but she became happy halfway through and asked for more and more as if playing with her uncle. From that day on, the secret relationship between the two began.
