Nagare To Issho Ni Iku

Nagare To Issho Ni Iku (流れと一緒に行く) is a Japanese manga series written and illustrated by a Xeronian manga artist, Uesugi Misao.

Plot
It focuses on preschoolers (or little kids), wearing tracksuits, were finding out that the bossy behaviors of big kids and teenagers is done by an evil energy-like beings, who controlled the minds of big kids and teenagers.