The Death Weapon Meister Academy (DWMA) is a special institution for humans who are born with the power to turn into weapons and the wielders of these weapons, called meisters. While the students of the EAT (Especially Advantaged Talent) class train themselves to become warriors of justice, the NOT (Normally Overcome Target) class is for those who just want to control their powers with the intent to not become a threat to others and to themselves. Tsugumi Harudori is a halberd demon weapon who takes part in the NOT class and befriends two meisters, Meme Tatane and Anya Hepburn, becoming indecisive about which one of them to choose as her partner. The series follows the daily lives of Tsugumi and her friends as they learn the ropes of the DWMA and have occasional encounters with the characters of the main series.