For some reason, my younger sister was wearing a bikini at home during summer vacation. As her older brother, I unexpectedly attacked her when she was in heat, and we ended up soaking in her sweat and love juices – the hottest day of the summer! (Inari Ayumi STARS-878)

Inari Ayumi, who lives in her hometown, had been looking forward to a trip to Hawaii with her family, but it was canceled due to an unexpected situation at her father's work. She bought a new swimsuit and, feeling very sorry, began living at home in a bikini. Her brother, disturbed by his sister wearing a bikini, became increasingly aroused! Unable to bear it any longer, they engaged in forbidden incest.