Tsukasa, a full-time housewife, recently moved into the apartment where Sayaka lives. Although both of them work, Sayaka mostly works remotely, and she cares about Tsukasa. She brings over some fitness equipment that is a product of her job and has Tsukasa try it out as a test, eventually relaxing both Kokoro and body and inviting her into a world of perversion. Sayaka is bisexual and likes Tsukasa.