Yuri Mana was specially trained by her childhood girlfriend to treat premature ejaculation; she abandoned her in order to manage her ejaculation. (MBRK-009)

Daichi, a sophomore in college, finally found a girlfriend and successfully ended his virginity. However, after dating for two years, he started to worry about premature ejaculation! Could it be because he had never had a girlfriend since childhood, so he had been masturbating to the point of exhaustion? His girlfriend also said, "You always only care about your own pleasure, and then it's over!!" In order to improve his premature ejaculation, he sought help from his childhood friend, Wuna, whom he had known since kindergarten. Under the guise of improving his premature ejaculation, she played with Daichi's ejaculation control. She was a childhood friend who loved to joke around!