Responses
This is quite similar but this is manhwa
https://www.mangago.zone/read-manga/radio_storm/
and this one (I'm not really sure about this)
https://www.mangago.zone/read-manga/undead_tsuyuhisa_fumi/
Was it yaoi or shounen ai?
I think the manga was set up in an apocalyptic world, and the seme and the uke were from two different bases. The uke was super important, and the uke was not allowed to go out from that base. They met when the seme was on a mission. They were stranded, I think. I don't remember the rest...