Haru, The Killer

A son kidnapped by a old man who ignored his three siblings and fully pretended the baby was abounded by his parents, a couple took him in and asked the goblins to help Blood and Magically adopt the child as their son and the husband made sure he was marked as his heir.

How will the son feel after finding out the truth about his true parents and why he has a very strong bloodlust and an unusual liking to knives since he first saw one? What will his true parents do once they find out what he went through?

AN: the cover picture is the tattoo the son has on his upper left shoulder. I also borrowed ideas from other stories on fanfiction.