Taimadou Gakuen 35 Shiken Shoutai Temporada 1 Episódio 4

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