One Day a Gangster

Top tier gangster! Top tier Alpha! 'Baek Pilseung' A foolish gangster who can't resist anything cute?! He fell for the prickly Maltese 'Nam Wooyoon,' who is clueless about the ways of the world. Wooyoon, an Omega without a proper registration, learns that his only brother has died and goes to find him, but his life takes a drastic turn when he meets the gangster Baek Pilseung. Can the pushover gangster Pilseung win over the prickly Wooyoon, who’s as difficult as a Maltese? Source: MU