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Daichi is a second-year university student. He is making his debut at university and has successfully found his first girlfriend and successfully lost his virginity, but after two years of dating, his recent worries are about "premature ejaculation"! Maybe it's because he's been a virgin for so long and has been masturbating too much... His girlfriend tells him, "You're the only one who gets pleasure, and that's it!!" He consults his childhood friend from kindergarten about this. In the name of improving premature ejaculation, Daichi's mischievous childhood friend plays with his ejaculation control!