A female college student in her spare time had a full day of intense sex with a man named Mitsuki Kamiya (HND-546).

Kamiya Mitsuki, leading an ordinary university life, gets so bored that she arranges to meet an older man at a hotel. They passionately kiss upon meeting, make advances towards each other, and have sex repeatedly until one of them ejaculates inside the other at the hotel! From morning till night, they relentlessly fuck each other in the hotel, unable to control their urge to ejaculate inside, engaging in unprotected sex all day long!