Earth faces an unprecedented threat from an invasion by the mysterious Kiseichuu. The Kiseichuu feed on human sexual energy, also known as “H-energy”, and weaken the human population. High school student Retto Enjo is a member of the hero group HXEROS, who fight together to save the earth from the Kiseichuu.
Don't make any noise.
Gib bloß keinen Mucks von dir.
No hagas ningún ruido.
Fais surtout pas de bruit.
Não faça nenhum barulho.
Только смотри, ни звука.