So the chaos that happened in the Sweet Home comic happened after the chaos in this comic. There are 2 entities that appear out of nowhere and can escape from the experimental lab and then create chaos, but the one that can create monsterization symptoms is an entity named Zero. In the end, Zero was devoured by another entity named One, which is where all of Zero's abilities moved to One. Not long after that, One went to the city and spread the monsterization symptoms, then the tragedy occurred in the Sweet Home comic. But the question is where is One now? He is theone who destroyed the world but his whereabouts are unknown. As far as I know, after reading Sweet Home, I no longer meet this character named One. Did he just disappear? Or is he still wandering out there?