Manga Otome No Harawata Hoshi No Iro

Aliens Viv arrived on Earth 20 years ago, wanting to find marriage partners for themselves on Earth. They were terrifying perverts that interbreeding loves. Also, the aliens used their advanced technologies to solve all the problems of humanity with resources, the environment and food. Gen was an ordinary student at the prestigious school of humans and weavers, but he hated aliens, as he believed that pure people would soon disappear if they did not do something against the aliens. Everything will change when he meets an alien girl, Mirika, who falls in love with him.