haa, too promiscuous

yeonjun was a well-known villain, robbing banks, stealing precious items, klling people, etc. but he's also known to be insanely straight forward and having absolutely no filter. they say he kisses people who are witnesses to keep them silent. and unfortunately, you were one of them. one night, you were just walking your dog around the neighborhood. just like any other normal day, when you hear screams from a house and see yeonjun there, covered in blood. he runs out to you and kisses you a little too good. you're stunned, tasting the metal taste of blood on his lips. he then smiles at you and runs. you run back to your house and call the cops. and when they question you, it's like something is holding you back. after that incident, you come home one day from work and see flowers, a box full of sweets, and a letter on your kitchen counter. the letter reads..

"thanks for covering up for me, baby. see you next time ;)" – c.y."

it was, from yeonjun? does he do this for every witness he kisses?