Otome no Harawata Hoshi no Iro

Twenty years ago, the Weve, an alien species, came to Earth seeking marriage partners. They are described as perverted and interested in interbreeding. Using their advanced technology, they have resolved global issues related to the environment, food, and resources. Gen is a student at the elite Shinryou Academy, a school for humans and Weve. He holds a strong dislike for the Weve, influenced by his late grandfather's warnings, fearing that humans will become extinct if the Weve are not addressed. Gen's perspective shifts when he meets Mirika, a Weve girl who develops feelings for him.