Yuri, a shy girl experiencing her first love, feels her heart flutter with excitement. With pure devotion to her boyfriend, she willingly fulfills his every desire. Ever since they first spent the night together, his cravings have grown stronger each day, and though blushing with shyness, she's resolved to satisfy his wishes. One day, he asks her, "Will you get in the bath wearing a school swimsuit?" Flustered by his request, she still heads to the bathroom in the swimsuit, determined to do anything for him. But waiting for her there are not just her boyfriend—but another man as well, both naked and eager for her arrival...!