From Kodomo's Kuni (1st volume 1)

the publisher:
Author: Naoto Akiyama
Size: 128mm x 182mm
Number of books: 1
Language: Japanese
Category: Shonen manga, manga
Latest release date: 2020-08-17

Synopsis:
It's no longer a kodomo, but it can't be an adult. At the beginning of Arakawa, a junior high school student, he suffers from his own career and fights with his mother.
It was comforted by a childhood friend Saeko Izawa in the park, and when he tried to return home, a huge earthquake occurred, and the mysterious numbers filled the sky.
Survival over adults and codmo begins!