What's the name of this character and what anime/manga/video game is he from ?

당신 took this from my post/question, didn't you? Well, I think this is just fanart, I found this on pinterest with no information, but I'd like to know if it actualy belongs to 아니메 또는 manga.

I think it's just fanart, but I'd 사랑 for it to be a series ^-^