START-590 — My kind senior colleague at my part-time job turns into a blowjob maniac when she gets drunk. As a virgin, I was immediately given a blowjob, then my balls and ass were licked, and she squeezed out so much thick semen that I was practically weak in the knees. - Haru Shibasaki

Shibasaki-san, the gym's training supervisor, is perfect at work, but when she drinks, she transforms into an incredibly wild "fellatio maniac"! As a virgin, I'm at her mercy, and before I know it, my heart and body are completely captivated... Her seduction and jealousy-fueled actions are all part of her plan to have me all to herself...!? I can no longer escape the loving yet educational guidance from my senior, whose intentions are hard to read!