[DeepL Translation - needs review] Volume 1 Introduction: One day, a mysterious man named Trance appears to Atsushi Kabayama, a dull high school student. He is from another world and wants Atsushi to have sex with his sister Tsubasa! If he doesn't, he says, the world will be destroyed. On, who has no idea what is going on, begins to be targeted by a woman called Aelias. The collapse of the world and its survival depend on the dull Atsushi having sex with Tsubasa! A fantastic love comedy by Y...
