Vampires are social outcasts. Either always hunted or bullied; they were never able to fit in. Chimon was a vampire, and he very much went through all of that.

He sat at the edge of a pond at night, sighing. He was was lonely. The population of vampires was decreasing every year, so he had no chance of finding his kind.

You were visiting your grandma but got lost, ending up in the same place as Chimon. You looked at the boy; not realizing he was a vampire and sat down next to him.