SILKS-032 step by step

Hayato and Mio were classmates in college, and even after graduating, they would often go out drinking together and maintained a friendship that transcended gender. As they approached their 30s, they finally realized how precious each other was and became lovers. However, their relationship did not progress properly, and Mio became anxious and frustrated. However, she soon discovered that the cause of this was Hayato's complex about premature ejaculation...?!