DIA GAME

Dia Game summary:

The beautiful vampire with long, silver hair Daia never attacked a human. He is constantly being watched by Kuro, a vampire hunter, and, because of this, he is always trying to run away. He eventually ends up in Japan and meet a merchant named Shishou, who then gives him a job and a place to stay. Daia is charmed by Shishou's kindness... Daia, who was always alone, starts to think about to drink Shishou's blood and make him a vampire as well. (Summary by BL Scanlations)