ハヴィラ戦記 (Series) favorite_border

Introduction to Volume 1: A small humanoid creature, the Havilaccu, was discovered in the Amami Islands.　They are protected by humans in order to prevent their extinction, and they are assigned to a mating pair. Oshino, a young Butterfly Man, has feelings for his mate, Mai, but their relationship is not progressing. One day, Oshino discovers Mai's true feelings for him...