Munō na Nana

Munou na Nana (無能なナナ, lit. "Talentless Nana") is a manga series by Loose Boy with illustrations by Iori Furuya. It is serialized in Shounen Gangan.

Plot
It is the year 20XX. Earth was assaulted by monsters that would come to be known as "the Enemy of Humanity." In order to deal with this threat, special schools comprised of teenagers with extraordinary abilities were formed. These people, who came to be known as "the Talented," had abilities that could defy the rules of reality. Among these people with supernatural powers was an outlier, an individual who was sent to one of these schools despite having no innate special abilities whatsoever. This is the story of our protagonist, who attempts to defeat the Enemies of Humanity through the use of intelligence and manipulation alone. Nana is a secret agent sent to the school to eliminate every student that has special powers.