searching for this one manhwa (yaoi)

From what i remember, the mc was running away from someone, he was found by a devil instead and was asked to make a deal, to get rid of the person that was chasing him, the price being his soul(?). Mc (black hair, glasses later on) asked for the devil's name but the devil made him guess as part of a game, thinking he will get it wrong. The mc guesses right(his name was crow, blonde hair) and so the demon attacks the mc and leaves him with a scar on his neck. Basically I know the story by heart but can't recall the damn name :))
Any help is much appreciated! (〜￣△￣)〜