Yumina Hirosaki (27), a music teacher, has just started a secret part-time job in the adult industry and is still inexperienced. To ease her tension, she's given Calpis mixed with increasing amounts of alcohol, which she keeps drinking continuously. Her face turns red as her mood steadily rises, and she begins to enjoy being filmed. Though she pretends to resist at first, her growing excitement leads her to allow the shoot to continue. When a blowjob begins, her arousal reaches its peak. Irritated yet obedient, she performs deep throat with drool running down her chin, her submission incredibly alluring. Changing into a tight office lady-style skirt, she starts masturbating with a toy on her own, eventually apologizing with a memorable "Sorry for coming without permission." When attempting missionary position penetration, it slips in effortlessly, highlighting her softness and natural responsiveness.