This work depicts incest between a man living alone in Tokyo and his rapidly growing busty sister. The development leading to the climax and the play, culminating in a happy ending, is captivating. Satsuki Mei's charm stands out, adding a sense of realism that makes the experience enjoyable. Although there are hesitations around the theme of incest, it is portrayed erotically while evoking a sexy and forbidden atmosphere. Particularly, Satsuki Mei's beautiful butt in the doggy style is sexy, and the final sex scene expresses mutual affection very well. It can be said that this is an excellent work in terms of the actors, actresses, and camera work. While handling the taboo of sibling incest, the light approach makes it easy for the audience to immerse themselves.