Office lady Manaka, who just finished her first part-time job as a new member of society, supports her boyfriend, a shy virgin struggling with premature ejaculation. He quickly cums from her gentle, careful handjob, leaving him desperate for improvement. Manaka wraps his penis in pantyhose and tenderly guides him through training, removing his underwear and using grinding motions to help him gradually build endurance. During one session, he suddenly penetrates her bareback without warning, losing his virginity and cumming inside her uncontrollably. Manaka enjoys the moment and lets him creampie her repeatedly. A warm yet intense journey unfolds as she helps him overcome his premature ejaculation.