PandaWarrior's manga / #Apocalypse(1)

@v2 ch 4 Seme are uke are childhood friends, basically brothers in apocalypse and uke thinks of seme as older brother. Their mother died. Continue to survive, but seme ends up being infected and leaves uke. Finds him years later in a facility with a "doctor" and seme pretended to lose his memory to keep uke safe. Doctor was experimenting for a cure and uke has the anti bodies that the doctor wants to use. Uke and gang find him years later alivie and living with another group of survivors. Doctor in the gang is collecting samples.