圭太くん18歳！

Keita is thought by his friends to be a playboy, but in reality he is an extremely shy 18-year-old virgin. He flirts with any girl he meets, and he also gives love advice to his even more inexperienced best friend Ichirō. However, when it comes to the girl he truly likes, Miku, he cannot bring himself to say a single proper word to her. The most he can do is type her name repeatedly on his computer: “MIKU MIKU MIKU MIKU.”