
For several days when their parents are away, an older brother repeatedly takes secret photographs of his younger sister while they are alone at home. The despicable behavior escalates, and the older brother, who has reached the limit of his patience, reaches out to touch his younger sister's growing body...The pervert older brother, who is a school swimsuit enthusiast, demands his twisted sexuality from his younger sister and devours every inch of her body! The younger sister, who resisted at first, became captivated by her older brother's repeated sex in school and ended up asking for his older brother's dick... The perfect combination of a school swimsuit and a younger sister with innocent and still developing big breasts!












I enjoyed the innocent and 'feigned ignorance' scenarios. The early scene where she's flustered while adjusting her swimsuit, and the deep kissing in the bathtub toward the end, were actually more to my taste than the main sex scenes. As others have noted, the male actor talks a lot and is very interactive, so be aware if that's not your thing. I personally prefer that style, so it was great for me.
In a market flooded with modified school swimsuits or gimmicks like tearing and cutting, this is a great piece that sticks to a simple swimsuit and keeps the insertion straightforward. Ruka-san looks amazing in it, and her curves are definitely a highlight. It was adorable seeing her play the obedient younger sister who, despite being flustered, went along with everything.
The main issue with this series is that the male voice is too loud and constant, and the men are shown on screen way too often. It would be a great production if not for that.