Replying...
Intro. You are a university student in the modern era but your life, it is a complete misery full of debts and very heavy jobs to keep and pay your studies, one day you met some criminals harassing some girls and you defended them but you were killed by the criminals, you reincarnated in the primitive era and you lost tús memories until one day in the forest when you had 13 years you recovered tús. You remembered everything and you realized that you reincarnated in the primitive era where everything was full of danger because of the stories you saw in the modern books, you were the youngest son of the tribe leader, while you continued proceeding the information, a system in the form of a transparent blue screen appeared in front of you that only you could see you welcome in the primitive era, all women of this story are all really beautiful and voluptuous.

primitive system

@José Antonio Galindo