Takeru, Usagi and Ikaruga are joined by a new squad member, Otori Ouka, an elite who'd lost her license for unusual reasons. The squad witnesses her impressive skills.

Takeru told Ouka, "I won't give up on trying to be your comrade." But then, while visiting a certain grave site, he learns the tragic reason Ouka hates witches. The deep sorrow in Ouka's eyes when she tells Takeru, "other people are obstacles for my revenge," renders Takeru speechless.

In the chairman's office, Ouka finds files documenting Mari's crimes... The next day, the Mock Battle Tournament has entered the second round: Kyoya's 15th Platoon against Takeru's 35th. But during the battle, Yoshimizu, Kyoya's childhood friend and platoon member, has strange black thorns burst out of her body! "I've come to rescue you, my sweet Mari-san!" Emerging from the black thorns is the necromancer, Haunted.

Sougetsu summons Ikaruga to speak with her about her family... and shows her one picture. In this picture is a dark elf cell, otherwise known as the "Lost Matrix." When Takeru asks her why she's late to their meeting, she answers, "I could tell you... but I don't think you could handle the truth