The protagonist wanted to become an adult soon in order to have sex with women. But he is now a university student and still a virgin. Because the women he had his eyes on were all older than him, they thought that he was childish, immature and such.

But those days are over. He is going to improve himself and becomes a better adult. Suddenly, 4 women shows interested in him. Is this a reward for his hard work? And so begins his adult sex life.

[Translated from Official Site]