Back to Prehistory, Let's Party!

Why can't I understand the ending?

Collapse, goodbye author.

I just flipped through the rest of the text, and then... I want to hit you

Damn, I want to kill you

It hurts, it has nothing to do with love

Damn, I really want to hit you_I promised to get high

I feel like the male protagonist is so amazing. In the first chapter, he smells a disgusting smell when he wakes up. There are things everywhere on the ground. The description is so disgusting. The male protagonist wakes up and doesn't clean the kennel where he continues to sleep at night. I am convinced that he continues to sleep at night.

The reason for touching someone's forehead is because there are many nerve endings in the hand, which are very sensitive and can feel temperature changes. It is generally used to check whether there is a fever, but it is not suitable for all diseases%>_<%

Fresh fungus is poisonous and cannot be eaten directly. It must be dried and soaked in water before eating (o_o)

Is this prehistoric? How does it look like a civilized society? The people here are so friendly.