

Nanao wanted to decline the offer but Kyouya had a suggestion. Nana points out that nobody has ever seen an enemy of humanity, so who is qualified in the first place? Nobody did. Nana nominates Nanao because he's nice, and he knows a lot about enemies of humanity. Moguo being angry made almost everyone put their hands down. After explaining the class leader concept, the teacher asks the students for volunteers. The teacher interrupts them in the middle of their conversation because Nana is being louder than him in the middle of a class. They get to know each other and eventually become friends. Nana soon discovers Nakajima's kindness and tells him he's a nice person. Nana asks Moguo to stop bullying Nanao, knowing that Moguo will use that to ask her on a date. Nanao explains that some of them can take a human form. Nana shows an illustration of an enemy of humanity thinking that's how they look like. Moguo tells Nana that Nanao is talentless. Nana immediately finds out that Nanao, who's trying to look good in front of her, is being bullied. She reveals that she's able to read minds but not the mood. Then, Nana Hiiragi arrives, who is cheerful and straightforward. Moguo is pretty sure Kyouya has already killed somebody. Kyouya Onodera seems antisocial, and refuses to reveal his power. The people around him call him talentless and make fun of him. He is even bullied by some of his classmates like Moguo. Also, he believes he doesn't have amazing abilities. Although he has been here for so long, he is unable to fit in with his class. It's been six months since Nanao transferred to the island. However, his fate changes drastically when he meets one of the two new transfers students, Nana Hiiragi. He was even called "Talentless" by his classmates. One of them, Nanao Nakajima, lacks faith in his own abilities.

Most of the students are enthusiastic about training to fight monsters called "enemies of humanity".

The story takes place in a school on an isolated island where people with talents(powers) are gathered.
