"A flower blooms in the world that's only filled with thorns..." Young lady from London, Katherine O'Sulivan, on her way to Cardiff, where she is supposed to marry a much older man she doesn't know nor love, is attacked by vampires. Thankfully she is saved by the count Shiro Akira, who however is also a vampire, but the pure blooded one. Katherine, unable to leave the count's mansion, slowly starts to discover a whole new world that she had no idea existed, hating at first, but in the end falling in love with the pure blooded vampire who saved her, and what's more - with reciprocity. But will Shiro's strict world accept their love? And won't the approaching great danger separate this pair of lovers?

She is like a wind - light, airy, fleeting, but she can change into a fiery and destructive storm - a yokai, Japanese demon and a personification of the moonlight. She doesn't want to hurt anyone, just dancing every night on the sky and shining like a light is enough for her to be happy. She is lively & curious like a child but when someone wants to hurt her or loved ones she will do everything to protect them. He is like a stone - standing firm in his resolutions, fulfilling the tasks entrusted to him without batting an eye - but there is a force that can break his hardened heart. A hunter of supernatural creatures, the best one. Fast, powerful, not showing his emotions. He does his job diligently but with one rule - don't kill the innocent. But also awfully lonely, avoiding others since he believes it's the best for everyone. Somehow those 2 are crossing their paths and it changes their lives completely... But in the background there is also a new danger arising - a powerful force that wants to wipe out the whole humanity - and to defeat it our hunter and a yokai will have to join forces.