Modaete yo, Adam-kun  

Adam's Sweet Agony, 悶えてよ、アダムくん

Itsuki is a high school student in a world where men are unable to reproduce due to a pandemic. Despite this, he is the only man capable of having children. To keep his secret safe, he transfers to a school with mostly female students. There he meets a friendly senior girl, a frustrated female teacher, a tomboyish "prince," and an heiress from a wealthy family. Itsuki must now decide which one of these women he will choose to be with.