What manga was this?

There was a part in a shounen ai manga where one of them was going to help his gay friend to talk to his mother so he asked the other guy to pretend with him to be boyfriends and I think in the elevator they decided to hold hands to look like bfs and they saw each other’s awkward faces from the mirror(?) and laughed IT WAS A DAMN WHOLESOME AWKWARD CUTE MOMENT please what was this from I feel like it was a part of a pretty known one but I can’t remember which...