A teenager attempts to defeat the enemies of humanity through the use of intelligence and manipulation alone.

Just when Nana thinks she's gotten off scot-free, it's revealed that there's a necromancer in the class who can manipulate dead bodies and draw out their memories and talents.

Nana is in the most dangerous position ever since she set foot on the island; her only chance of escape is discovering Yuka's weakness before the powers of necromancy kill her.

Nana's classmates are starting to suspect her, so she devises a scheme to cover her tracks using the pair of gyaru bullies.

During his search, Kyōya discovers that Nana does not have Kirara's phone; Michiru later catches Nana off guard, but Nana is able to subdue her.