All Kira Yuuki wants is to live a normal teenage life, but there's just one problem - he's not entirely human. As a Lemora Saramanda, he bears a strange symbol on his palm that serves as a reminder of his unique status. Despite having friends like Inaba and Yukia, being a special member of his species has made him a target for those seeking to exploit his power. The Rosen Kroitz Secret Society is one such group that captures and trains Saramandas like Kira for their own purposes. In a twist of fate, Kira is caught by his pursuers, prompting Inaba and Yukia to give chase. Their pursuit results in a life-changing accident, and the sudden arrival of Kira's older brother further complicates matters for the trio.