Rin a sports gym with the aim of becoming the queen of beautiful buttocks. However, there she is subjected to training that is akin to sexual harassment. However, even though she is embarrassed, Rin's body heats up deep inside and Rin gradually begins to feel pleasure. As the torture becomes more intense, her dormant masochistic nature blossoms! She begins to seek pleasure herself, sucking the dick with her mouth and pussy and cumming over and over again!