It had only one volume and the uke was targeted by demons due to his energy so the seme is an assigned bodyguard to protect him. They need to share energies or something of that sort, and then they fall in love. The seme and uke both had darker coloured hair, I don't remember much but I've been looking for it for a while. Does someone know it?
If they were just going to do this, they might as well have shown gyeol or sohee, I'm more interested in them than whatever this is
Slice of life manhwas like this usually drag out for hundreds of chapters