Demon From Afar

Demon From Afar (異域之鬼, Iiki no Ki) is a manga by Kaori Yuki. It was serialized in the Aria manga magazine from July 28, 2010 to March 28, 2013. It is complete in six volumes. Yen Press has licensed the manga for release in English.

Plot
Orphaned in an earthquake, Sorath is taken in by Baron Kamichika, the lord of "Blood Blossom Manor." There, he pledges eternal friendship with Garan, the Baron's heir, and Kiyora, Garan's fiancée. But their friendship turns grisly by events none of them could foresee. The tender feelings each secretly harbors, the machinations of Baron Kamichika, and his strange and seductive female companion, and a fateful encounter with a young girl with bizarre powers...all draw them to the Walpurgis Night and the nightmare's climax!