Episode 12 (Anime)

Possibility (生還率（ポッシビリティー）, Seikan-ritsu (posshibiritī)) is the twelfth episode of the  anime series.

Summary
Alvin gathers some students and heads to look for Ophelia. Days later, Oliver and his friends still have no news about Pete. Guy wants to go look for him, hoping that he at least can cook for him, but Nanao stops him, explaining that in her country, most people who went missing, end up being dead. Oliver states that the chimeras that took Pete were designed to capture them alive. He doesn't know what Ophelia wants with the students, but he believes there is high chance that he is still alive. Having nothing they can do, they are forced to continue their normal school life.

Oliver meets with Gwyn and Shannon, and asks them if they can save Pete. Gwyn explains that he and Shannon are planning to join the student council and go after Ophelia, however her lair is in the third layer and it won't be easy to find. Katie speaks with Luther, however he informs her that teacher will help with the search only after eight days have passed as its meant that the students have to handle such things on their own. Michela informs Oliver that she spoke with her father, asking him for a personal favor, however he told her that if you lack the power to protect your friends, you lose them the moment you gain them. Michela feels responsible for Pete and intends to head into he labyrinth tonight. Oliver doesn't want her to go and decides to go with her, however she insist that he doesn't go because if the two go, then Guy, Katie and Nanao will also go. Vera interrupts them noting that they are arguing if one of them should die or both. She then asks them to come with her since Katie wants to speak with them.

Katie had offered Vera to examine her body however she wants if she saves Pete. Oliver is against it as she is basically selling herself to Vera. Oliver asks Vera what she thinks are Pete's chances. Knowing the situation and guessing what Ophelia is doing, Vera states that he has twenty percent chance for survival. Ophelia is cornered and will easily throw away the students lives for her research, however what she is doing takes time, which is why Pete has twenty percent chance. Vera states that they can increase the chance by one percent. She explains that her research had hit a dead end and will like Katie to join her research and in return she will train them. She will also find her lair and take them there, however after that Katie will official become her research partner. Katie is ready to accept as she is willing to do anything to save her friends. However, Vera informs her that she isn't ready and she won't be going in the labyrinth. Katie and Michela then go to pick up Nanao, where Katie explains that she won't be coming. Oliver goes to Guy and also informs him that he shouldn't come. Guy knows that he will slow them down and accepts it, however he gives some seeds and food to Oliver. Before going into the labyrinth, Vera gives Milihand to Katie and tells her that if she doesn't return, Milihand will server as a key to access Vera's research notes. Meanwhile, Pete wakes up in a cell, but pretends to be asleep when Ophelia shows up.

Inside the labyrinth, Vera explains that the Salvatori clan counts succubi among its distant ancestors. They mix the natures of different species together within the womb, and bring forth offspring, which used to be the special power of the succubus. They were trying to create the perfect being, however they failed and now the succubi are de-facto extinct. However, they managed to find another use of their wombs and turned them into culture tanks that can create synthetic beasts to perform various tasks. The chimera that Ophelia made require a lot of mana. As she needs a lot of mana for her project, Ophelia had decides to kidnap underclassmen and squeeze the mana from them. Vera doesn't know if taking the mana hurts, but guesses Ophelia put everyone to sleep. However she only needs men as she takes the mana from their sperm. Oliver and the rest the realize this can be a problem and Nanao explains that Pete is a reversi. Vera then confirms that if Ophelia finds out, she may not need Pete anymore and may kill him.

The group gets into their base, where they find Marco, who explains that the chimeras didn't chase him. Vera is then sure that the chimeras followed Ophelia's orders. She gives everyone magic potions to protect them against Ophelia's perfume. Meanwhile, Kevin Walker meets Alvin. He explains he hoped to find him and gives him a map of the third layer, although he couldn't find Ophelia's lair.

Vera and the rest encounter one of Ophelia's chimeras. Vera states they correctly ran away as they need to be at least in their third year to be able to defeat it. However to save Pete, they will need to fight them and tells them to watch her. Vera then showcases that the chimera is practically blind by throwing some decoys and that when fighting a large beast, they should always move. They need to have a plan in mind that will lead to a decisive blow. The chimera quickly adapts and starts to ignore the decoys, however Vera states they can still use that to their advantage and slows her movement making the chimera think she is also a decoy and allowing her to easily approach and defeat it. Vera then states they always need to observe the creature, find its weak points and form a plan, however they don't need to do that all alone. The group then reaches the second layer.

Characters

 * Alvin Godfrey
 * Carlos Whitrow
 * Lesedi Ingwe
 * Tim Linton
 * Oliver Horn
 * Michela McFarlane
 * Katie Aalto
 * Guy Greenwood
 * Nanao Hibiya
 * Gwyn Sherwood
 * Shannon Sherwood
 * Tullio Rossi
 * Luther Garland
 * Vera Miligan
 * Pete Reston
 * Joseph Albright
 * Ophelia Salvadori
 * Marco
 * Kevin Walker