(⌒▽⌒) I read this before! Although, it's not what I'm looking for. I could've also asked about this on the questions, if I remembered, so thank you very much!
That reminds me for the first manga. I think they were in the kitchen, at some point, when the two guys went to the burned apartment. And they probably also slept there.
Only manga i know with burn incident is this one- uke apartment got burned-
https://www.mangago.zone/read-manga/gravity_eyes/
Guys, I found it! Or rather, someone found it for me. Hehe~ https://www.mangago.zone/home/mangatopic/16477317/?cid=16477888#respond
Thanks for those who tried to help, though. (⌒▽⌒)
I only remember that it's BL and one of the two guys had his apartment burned down, so they stayed at the other guy's place. Later on, they both went to the burned down apartment, I think? And I remember that one of them said it stinks in there or something. ( ̄∇ ̄") I think I might've mixed it up, but I remember two BL manga with fire incidents. One of the guys was in the middle of the work, I think? I remember there being many people, in that scenario. And they got informed that someone's place got burned down. I'm not sure if it's the manga above, or another manga.