A devilish father who has sexually trained his own daughter Lala (142cm, hairless) with twisted love now sets his sights on his niece Yuka (136cm, hairless) who he is taking care of for the summer vacation. "Lala, show Yuka an example." Yuka is frightened by the abnormal incest between her kind uncle and Lala, who is as close as sisters to her. Her underdeveloped body resists, but is gradually trained to perform deep throating, swallow semen, beg for creampies, and clean up blowjobs. And... it becomes commonplace for the two cousins ​​to serve their "uncle" together.