He's My Only Vampire Vol. 5
A dangerously seductive Vampire paranormal romance! Acquiring a third Stigma took a heavy toll on Aki's body. To help him recuperate, Kana and the others plan a trip to a cozy hot-spring resort deep in the mist-shrouded mountains. Little do they know, this outing will open the sinister door of Aki's "original sin," and his hidden past will finally come to light!