Responses
'Keeper of the pearl' i think
http://www.mangago.zone/read-manga/kimi_no_yume_o_mite_iru/ pretty sure its this one
It was! Thank you! I tried finding it in the supernatural genre (also scifi) but apparently it wasn't tagged with supernatural/scifi/fantasy.
What's the story where the seme dies but the uke gets one wish and uses it to change the past so that they don't meet? Then they meet up again and the free-spirited seme had become straightlaced, but they fall in love again?