Brat Hunt Chu

One day, Chiyu Usamoto, a sixth grader, suddenly begins to see strange creatures...? The true identities of the creatures are "brats," lost children whose emotions have been separated from their body in order to prevent them from thinking such things! Along with 2nd year middle schooler Gin Kitora, she ends up becoming a Brat Hunter?!

(Source: Kodansha, translated)