Whilst the rest of Death City celebrate Halloween with a Battle Festival amongst the EAT students, Kim and Jacqueline are tasked with watching over Tsugumi, who had been grounded for her actions. Meanwhile, as Akane and Clay escort Anya towards the airport, the city is suddenly overrun by NOT students turned into Traitors, which the EAT students have to fend off.
Tsugumi becomes upset when she receives a letter from her mother informing her that her dog, Pochi, had gotten involved in an accident, and ends up lashing out at Meme for forgetting things so easily. That night, Tsugumi and Anya follow Meme during one of her sleepwalks, winding up at the hidden research room where they are discovered by Akane and Clay.
Akane and Clay report to Sid that they suspect the culprit behind the Traitor incidents to be a witch named Shaula Gorgon. Meanwhile, Tsugumi and the others get together for a study session at Deathbucks, helping out when the place gets busier, even if only for a brief moment.
After dreaming about Kim, Jacqueline is bothered by feelings of attraction for her. Kim leads the girls in a pool-cleaning job, and after she takes most of the pay, they help Jacqueline try to win Kim over, while learning about her mysterious background.
After a nightmare, Tsugumi wonders why the meisters choose to come to DWMA. She spends some time talking to Akane, who asks her to be his girlfriend, only to say he was joking. The class takes their physical fitness exams, where both Meme and Anya excel.
Eternal Feather reveals more about Kim's history, as well as the origin of her name. A new threat, known as "Traitor," menaces the students of DWMA, and Sid sends Clay and Akane to scare them off. Anya feels left out when she misses her turn with Tsugumi.
Ding-dong! Dead-dong! Class is about to begin, and you don't want to be late on your first day of school! Join Tsugumi Harudori in the "NOT" class at Death Weapon Meister Academy, a school dedicated to training transforming weapons like Tsugumi and the meisters who will wield them. Many "NOT" (Normally Overcome Target) students aspire to join the elite "EAT" (Especially Advantaged Talent) class. But it may take Tsugumi some time to find her confidence-- and a partner -- at this crazy school!