Two or Three Things About the Sickly and Delicate Baby Bravely Breaking into the Bookstore

[Quick travel + 1vN + unlimited flow + super grandma's perspective + more than one world change 1] Shui Huaizhu died inexplicably, and what was waiting for him was a robot at the junction of life and death. "Do you want to join the Space-Time Administration?" He seemed to have no reason to refuse. The mysteriously missing director, the chaotic parallel world, and more and more secrets are unfolding before his eyes. He obviously just wants to go home, but if he is really involved, can this original wish still be realized?