The Unyielding Bond's of the Kuramochis' (Volume 1)

Tsuyo, a twenty year old young man, is with his two brothers when his parents video call him to ask what they want from the grocery store. The parents see a disgusting creature, a sort of monster-like human, but it isn't human anymore...

Tsuyo's parents tell him to take action quickly, and they will be home soon. Tsuyo will have to take action into his own hands and protect his brothers through this new, broken world.