Itsuki Sonomiya

In a world where every male has been struck by crippling erectile dysfunction, he is the only guy who has not lost his mojo. While he has always had a regular interest in the opposite sex, the "secret" he holds in his pants has held him back from making the first move. Then, by a twist of fate, he transfers to Shinonome Academy, where more than 90% of the students are girls! Once there, he starts to realize just how unique he really is.

(Source: Official site)