I went to my girlfriend's house, only to find out her older sister was cheating on me!? A fierce battle for her harem between slender, busty sisters. (Suzukaze Yu, Amagami Ririka EBWH-250)

"Hey, shall we decide who should ejaculate inside whom?"...Is this a dream? Of course it's a dream. I never imagined that my girlfriend, the devilish tomboy Rika, and my cheating partner, the reliable and earnest Uesaka, are actually sisters, and that they would both be approaching me at the same time. No way, this must be a dream. Of course it's a dream. "You prefer my tender hole to your sister's, don't you?" "My hole is tighter than my sister's!"...No, it seems this isn't a dream, it's real. Her face and figure are impeccable—a harem of sisters, the demand for vaginal ejaculation is huge. I'm experiencing the happiest battle scene in the world!