So the manga is just like kiken na otonarisan where the seme (I think) sleeps with another man's wife, the man who later becomes his boss has him as a live-in worker then they get together, forgot the name thank you so much to anyone who can answer this!!

Is it second life by Takarai Saki ?

Yes thank you yessss! God bless! If you have any yaoi titles you can't remember let me know!!