Two protagonists without official names wander around in the apocalypse.
The male protagonist is making soy sauce in the whole text, the system is making soy sauce in the whole text, and the female protagonist... Seems to be making soy sauce too...
Then this article can actually be called (On how the male and female protagonists are so good in just twenty chapters?!)
This article is also known as "The system installation must be wrong", "The system is still young, don't play with me, please let me go", "What the hell are these"...
Intention: