Looking for a manwha!

It has two cops, they are friends but has chemistry. There is one scene i remember, they attended a competition, "Who kiss the longest" and they straight make out infront of everyone after being riled by the speaker for not kissing correctly. In the later part, they will save a little boy that literally looks like their child but sadly the child was taken by his grandmother. Anyway guys, can anyone tell me if ever you recognize the plot? （/TДT)/