Recomendatoions for this one very specific troupe who somehow is not uncommon

Looking for recommendations of bl works where MC dies and wakes up in another persons body. Someone else who had a crush on MC but never told them (one sided and unknown/mutual but unspoken/anything except past lovers). Because of ”something” it’s MC chooses to not reveal their real identity but the other person catches on, basically a game of hidden identity).

Works I’ve read that fit the description:
Kill the light
At the end of the road
Again
Regas
Monochrome rumor
Approximal guide
A guide out to succeed
For you who grieves

Thanks!