The year is 20XX. Nanao, an outcast with a paranormal talent, lives on a remote island training with others like him to fight against the enemies of humanity. Nana, a bubbly transfer student, befriends him and encourages him to become their leader...

Nana's secret is in danger of being exposed when a boy in her class is revealed to have the ability to travel into the past and rewrite history.

Nana befriends Kyoya, the other transfer student at the school, in an attempt to discover his talent before he finds out what really happened to Nanao.

Nana's mission comes to a standstill when Kyoya starts to spy on her. When she discovers Michiru has healing abilities, she hatches a plan to use Michiru's talent to regain the upper hand.

Tsunekichi weaponizes his power to see Nana's future wrongdoings to blackmail her into being his girlfriend. Nana thinks she might be able to defy fate, but another sharp twist in the road is waiting for her.

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.

Between Nana's whereabouts during the mysterious murders, her suspicious behavior, and now the pile of dead bodies in the forest, Nana's classmates are starting to suspect her. She devises a scheme to cover her tracks using the pair of gyaru bullies.

Jin interrogates Nana, trying to learn more about her and the organization that sent her to the island. During these talks, the door to Nana's soul cracks open and she starts to remember things she would rather forget.

For the first time, Nana and Kyoya work together to try to solve the most recent murder. But Nana has her own mystery to worry about when Michiru starts acting noticeably strange.

Nana's mission moves to the back burner when she has to spend the day nursing Michiru back to health. Deeply disturbed by her own behavior, Nana asks Michiru to open up about her past, hoping to gain some insight into what made her so selfless.

Kyoya wants Nana to help him unmask the killer. A part of Nana wants to let the killer do her work for her, but when Michiru gets a mysterious summons, Nana has to choose between her mission and Michiru.