With his parents overseas, Kimihito Kurusu led a calm, ordinary existence alone until monster girls began to swarm. In this alternate universe Japan is the pioneering nation championing the assimilation of non‑human beings into society. When the bungling interspecies liaison Agent Smith abandons Kimihito, he is left as caretaker for a Lamia called Miia. The newly christened "Darling" instantly draws girls of many breeds, creating a growing harem brimming with sensuality and desire.
Yet for him and the women, interspecies sexual relations are prohibited by the Interspecies Exchange Act. The sole exception is an experimental marriage clause. Kimihito"s days become tangled with species‑specific restrictions and delicate interspecies statutes as the passionate, affectionate, and lustful women chase his every action, craving his romantic and sexual attention. With fresh species frequently emerging and incidents erupting spontaneously, the path Kimihito and his harem will take remains uncertain.
