Responses
The scenario doesn't match 100 % but this chapter popped up in my mind after reading your comment
http://www.mangago.zone/read-manga/my_last_love_scenario/uu/iur_chapter-2/pg-1/
I think you're talking about curious recipe? There's a scene exactly like this in the manhwa.
http://www.mangago.zone/read-manga/curious_recipe/uu/curious_recipe-chapter-19/1/

wasn't there is a scene where justin and edward drinking with their friends and then later they went outside..those friends thought that they might be fighting so they went outside to prevent them from fighting but what the friends saw was they were kissing..
or did the scene come from another manhwa?? if that so, please do tell me the name of the manhwa..i want to reread again