Sekai wo Sukuu Tame ni Watashi to Asachun Dekimasu ka?

Long ago the Chosen One defeated the Demon King and brought peace to the worldnot that it matters to ordinary high school student Hironori Tabata But word is the Demon Kings coming back and the only thing that can stop him is whats in Hironoris pants Before long demihuman girls are throwing themselves at him hoping to give birth to the next Chosen One and Hironori has to worry more about saving his chastity for the girl he loves than saving the world