Help

Trying to remember the name of a bl manga(possibly manhwa) with a scene where the four friends go to dinner. Friends a & b are dating and out with their relationship but friends c & d are also secretly dating, they just haven't told anyone yet. when leaving and getting in a car, friends a & b see the other two making out in the alley and thats how they find out about their friends dating. pretty sure this happens towards the end of the story and this second couple getting together is more of a side story/extra