Ascension?! Silent Survival / The Unkillable Twin Tail / Crusade—Ragnarok of Angels and Demons

On a train to her new middle school, Momoka Sonokawa is preyed upon by a molester, only to be rescued by a girl wielding dual pistols. The girl turns out to be Miou Ootori, Momoka's upperclassman and president of the Aogiri Academy's Survival Game Club, called...