ARMED GIRL'S
MACHIAVELLISM OVA

Pride, Envy, Wrath, Sloth, Greed, Gluttony, Lust. These are the seven sins laid upon seven girls who rule over Biblia Academy. To retake his world, the boy decides he must control these sins... The boy, Arata Kasuga, has had the world he knows hit by a mysterious phenomenon "Collapse Phenomenon"

The "school sword action" story revolves around Magic Knights, modern magic-users who fight with weapons converted from their souls. Ikki Kurogane goes to a school for these Magic Knights, but he is the "Failed Knight" or "Worst One" who is failing because he has no magical skills. However, one day,

Against the savage monsters that lurk outside the glass walls of Flandore, the last remnants of humanity have only one defense: the mana magic wielded only by members of the Noble class. When Melida, heiress to House of Angel, fails to manifest her magic upon reaching majority, the half-vampire Kufa