A hero is made of H and Ero. In a world on the verge of a great disaster that began five years ago, heroes who, with the help of a device called HxEros, use the power of Ecchi (H) and erotic power (Ero) to save the planet from libido-devouring monsters! Enjou Retto, is a high school student who finds out he is one of the owners of the HxEROS force, created to fight this threat and wants to use his new power to protect his childhood friend Hoshino Kirara.