Manga by author El Diablo

The vampires have conquered the entire world. Hibiki belongs to "The Resistance," a group opposing the vampires' rule, but he's weak and treated as a nuisance, all the while having nightmares of vampires doing as they please with humans. However, when he is unable to protect Captain Maria, whom he respects very much, Hibiki is killed. He then meets the soul of Vlad, the vampire king who was killed by his kin in a rebellion 500 years ago, and obtains his power! It may be the power of the Vampires he loathes, but Hibiki is willing to accept it to protect the people he cares for!

"Jin Taeha," the successor of Korea's leading company "Cheongu," survived alone after a terrorist attack during a yacht trip with his family. He learns that his family was killed not by accident but due to power struggles among his relatives. Entering the "Salerno Family," an Italian mafia family, he prepares for his revenge.After 17 years, he returns to Korea and finally begins his revenge.