I don’t have the manhwa but I do have a Chinese novel like that except the plot is way bigger, confusing and everything is connected. It makes me want to cry but the plot is so complicated it’s beautiful. It called Mist and the translator is KKtranslates. It’s a great novel, not a comic but it does include what you’re talking about if you’re interested in reading a cool book. Though, in my opinion the blurb is a bit misleading for such a complicated book, read it if you want.(づ￣ ³￣)づ
try desd man switch
ithink there was another one where basically mc is stuck in a horror game and converts the seme who is the killer to team with him but i dun rmbr the name
https://www.reddit.com/r/BL_manhwa/comments/15ujddi/zombie_apocalypse_themed_bl/
Here the title:I Have To Be A Great Villain
YES DEAD MAN SWITCH TY
What's it called, it's a BL manhw set in a zombie apocalypse, the main characters are Uke and Seme. There's a peculiarity that if Uke dies, the world, let's say, restarts and Seme is the only one who is aware of it.