Because he wants to have sex with his sister, his younger brother mixes an aphrodisiac he bought from a dark mail order site into his body cream and forces him to estrus. Her older sister, who has been heightened to the extreme, culminates in her younger brother's obscene act, and even her brother's semen is injected into her vagina! Older sister/Mai (pseudonym) nursery teacher/effect/★★★ Older sister/Kokona (pseudonym) trimmer/effect/★★★ Older sister/Aoi (pseudonym) apparel/effect/★★★★★
