Modaete yo, Adam-kun Episode 1

The secret of the new student, Itsuki Sonomiya, is that he is the only person in the world who does not suffer from impotence. Protecting this secret in a school with more than 90% girls proves to be challenging. However, following a certain event, Itsuki catches the attention of the school's guide, senior Akari Himeno, who realizes that he is in fact, very special.