vzack's manga / #amnesia(5)

vampire-like supernatural powers, master with tragic past (familie murdered due to betrayaled), master saves a boy with becomes his servant and the servant falls in love with master

a deep care for a stranger found unconscious at his doorstep which later found out that the person has 2 personality in which he falls in love with both; strong bonds with both personalities, deep theme and story about the characters

multi layer story, interesting magic power, lot of intrig between the organizations