Well these are not exactly like Lost in the Cloud but they have the same theme of dealing with traumas:
https://www.mangago.me/read-manga/love_sick_dog/
https://www.mangago.me/read-manga/raising_a_bat/
For Love Sick Dog, actually the relationship and the characters between the mains are not toxic, but they're dealing with a kinda unique situation. And for Raising a Bat, the bottom is kinda toxic and had been horrible to the top

Pls someone recommend me a BL just like Lost in the clouds ive been searching for ages and i couldn't find any that hit the spot like this one does. I love toxic characters but most times these bl characters are not "toxic" but straight up grapists or psychopaths i just want lost in the clouds part2