bitch the song made it worst. anyway, saw lots of people asking bout this before but sadly no one replied i think it's not in this site
It's adapted from a thai novel and series called "Until we meet again" I'm not sure if its a manga or a fan art but I guess it can be a manga although it's not yet translated or scanlated.
Sorry I don't know the name but imagine one of them died while the other survived that would be heartbreaking
I research a little about it, and it seems that it has a live action series or movie?? I think it matches your description about. And I think, it's a kind of reincarnation genre, so they will still meet again. just like its title: "Until We Meet Again"
Here's the link:
https://mydramalist.com/33506-until-we-meet-again-the-series
I found the manga in a tweeti sadly it's in Japanese :( https://mobile.twitter.com › status
KADOKAWAタイBL公式 on Twitter: "『The Red Thread』見どころ ...
This is a yaoi manga a couple was sitting on a couch and their parents come in i think? One of the dad had a gun and was threatening the two with a gun on of the couple picked up the gun and shoot his head his last words were 'i love you' and then the uke also picked p the gun and shoot his head his last words were also 'i love you too'
If ya still dont get it heres the link:
https://vt.tiktok.com/ZSJVqK7Da/