Otome no Harawata Hoshi no Iro

Two decades ago, an alien race known as the Weve descended upon Earth with a single purpose: to find marriage partners among humanity. Though notorious for their perverted nature and fondness for interbreeding, the Weve also brought remarkably advanced technology, using it to resolve every one of Earth's most pressing problems—from environmental decay to food shortages and scarce resources. Gen is a student at Shinryou Academy, a prestigious institution where humans and Weve study side by side. Despite the seemingly harmonious setting, he harbors a deep loathing for the alien race, a prejudice rooted in the words of his late grandfather. Gen is convinced that unless something is done about the Weve soon, pure humans will inevitably fade into extinction. His convictions are put to the test, however, when he crosses paths with Mirika, a Weve girl who falls deeply in love with him. Torn between his grandfather's lingering warnings and the earnest affection of a girl from the very species he despises, Gen finds himself swept into an unexpected romance that challenges everything he believes.