Bocchan

Viktor is the firstborn of his noble family and was once considered the next head of his family. As the single possessor of a curse, Viktor lives alone in a decrepit mansion located deep within a forest with his servants, Alice and Rob. Before Viktor had been cursed, he used to be an outgoing child. Playing with friends and interacting with his family. However, when he turned five, a witch of unknown origin cursed him. This curse prevents him from being able to touch living things or be touched by living things, as anything he touches or touches him will die.

(Source: The Duke of Death and His Maid Wiki)