Responses
It's a long shot, but is it this one?
https://www.mangago.zone/read-manga/shinigami_wa_korosenai/
Nope but This is kinda similar to that , in that manga uke was a office worker n met him on the road or something like tht n also uke was kinda confused like he wasn’t sure if their relationship ended or not ever since seme disappeared
Its a bl manga . Seme was a kind of sprite / supernatural/ or something like that . And uke was young when he met him then later in the end of the manga seme disappeared saying he would come back as a human or something ( not sure tho he was fading away in that time so thtss y ) then years later uke works in a company then he meets seme while going back then they get back together