Summary
When her twin sister Izuru returned home one day, Kokone was studying in her room. Izuru immediately went to their elder brother’s room and began to make love to each other. Because they are twins, they can share feelings of pain and pleasure, so Kokone was unable to resist the waves of pleasure, and she began fingering herself until the cries of orgasm of the twins echoed in both rooms at the same time. Kokone, annoyed by them, decides to steal their brother from Izuru.