my life in a crossover world with a system

Disclaimer I am not the owner of any of the franchises that appear in this story, also this story will not be totally faithful to the original content of the franchises that will be in this story, another thing that is modification in it so that it can fit into this story so for those who are faithful to the original content I ask for respect, the only thing that belongs to me is the original story and characters.

A university student, who just finished his studies, ended up dead due to an accident that caused his death, but now he is in another world but with a baby with a rare system that was adopted by a family called kamado.