In the personnel department, Usui Serina is always the kind of employee who puts others' concerns before her own, readily listening to her coworkers' problems. So it comes as a surprising twist when she's assigned to an erotic task. Her approachable and friendly presence becomes even more striking in this new situation. Once she undresses, her self-proclaimed lush, soft F-cup breasts are revealed—drawing her into SOD's signature multi-erotic challenges as she experiences everything for the first time. Witness the captivating fusion of her caring nature and unexpected eroticism in this debut performance.