Recently became siblings due to their parents' remarriage. After learning that her brother is a complete non-starter and an incel, Akane decided to play a prank on him by making him drink a super-erection pill she happened to have. To her surprise, he awakens as a sex machine! The drug's effects are too strong, leading him to assault and perform fellatio... Still in heat, the brother sneaks into his sister's room for intense sex... Secretly performs paizuri in a room where family members are present... Interrupts her while she's bathing and forces a mixed bath... Infinite internal ejaculation ghost piston! The sister, who is continuously orgasming non-stop, can't stop moving her hips even after climaxing due to her out-of-control brother in heat.
