This Terrible World Needs Elementary Schoolers to Save It

The protagonist really is a child! He's seven when the main story begins, but he's pretty clever, a Chinese bunny, and has a System.

Third-person narration, pure Detective Conan, everyone survives.

Well, it's a mysterious combination of a game world and the real world, and there will be conquerors, both good and bad.

Aki Otoha had been growing up in Japan since the age of five. At five, she also got a System, and learned that this world was a recycling center for the dead from another world.

Aki Otoha: [Subway, old man, phone.jpg]

This rotten world.

Theme: Those who are alive are still living.