NoSafeWordSlut

The ML died, which devastated the MC and left him depressed, unwilling to move on. He discovered that when he writes letters addressed to the ML, it allows him to "summon" the ML back into the world and enjoy his company once again. (Note: after each summoning, the letter becomes wet or damp.) However, after each summoning, the water darkens, and something else begins to possess the ML’s spirit. The ML doesn’t want to hurt the MC, so he asks him to stop and move on — and the MC finally does.

some parts may be confusing, i have a memory of a goldfish
┗( T﹏T )┛

I forgot the title of a BL manga that's about someone (ML) that died and then became a ghost because he still had stuff he wanted to accomplish in the world. Then there's the MC who can see him and had a crush on him when he was still alive, he helped the ML accomplish his goals like giving back stuff he borrowed, talking to his parents etc. THEN after they finished the ML's needs, he was still on earth so he understood that the MC must've been the one keeping him there after all cuz he liked him and couldn't accept his death. Then made love after talking then the next day ML finally ascended to heaven or wtv :((((