Koroshi-ya to freeter
Ch5 So you're a salary guy who's often robbed by Yakuza. You find a guy bleeding in an alley you almost called the police but he pounced on you saying he'll be troubled if you did. So you took him home, patched him up. He told you he's an assassin and will be your bodyguard
U Kill I Cook
Ch 18 So your dream is to become a cook, you were almost assaulted by the chef you asked but he was called away to make tea then the whole household was murdered by a handsome assassin while you nonchalantly made pasta unaware of danger. You weren't on his list, he smelt your food and ate it. You were mad but noticed everyone was dead so you were scared. He fell for your cooking but I'd dense of the meaning behind something's he says. You were kidnapped and saved by him now your hired as a personal chef
Mumyoutou