Hayato and Mio, former classmates in college, maintained a close bond after graduation, forming a deep friendship that transcended gender. By their thirties, new feelings began to emerge between them, and they finally decided to become lovers. However, their relationship did not progress as smoothly as they hoped. Mio found herself struggling with growing anxiety and dissatisfaction, stemming from Hayato's premature ejaculation complex. His pride and inner conflict created a significant barrier in their romance. As the truth comes to light, Mio is forced to confront how she should truly face Hayato and their future together.