New office lady Honda Tsubaki, a slender beauty with a short haircut, is hired as an outlet for her male coworkers' sexual desires. On her first day, she's ordered to masturbate in front of them, her shaved pussy stuffed with a powerful vibrator, forced to climax repeatedly. Overwhelmed at first, she's soon subjected to relentless verbal teasing and double penetration—her mouth and tight slit pounded simultaneously by two virile, well-endowed men. Her first threesome experience gradually awakens intense pleasure, driving her to orgasm after orgasm. Finally, she's filled with multiple creampie loads as she pleads, "Cum inside me!" marking the end of her first workday. After such an intense initiation, what fate awaits her from here on?