In Episode 12, Eve battles the Takao sisters, Hijiri and Itsuki. Due to her silence—having lost her voice in combat—Eve is mistaken for a monster and attacked by Itsuki. Hijiri intervenes and recognizes Eve's intelligence and ability to communicate. After a tense exchange, the two reach an understanding, with Eve concealing Touka's identity to protect him.

Meanwhile, Touka continues his solo fight against the human-faced beasts, pushing his abilities to their limits. By utilizing status effects like Paralysis and Berserker, he systematically defeats the monsters, even reaching Level 2000 and unlocking advanced skills. Exhausted and wounded, he collapses but is found by Eve and brought back to her camp.

At the camp, Seras and Lis are relieved that Touka and the others have returned safely. Seras tends to Touka's injuries, and the two share a heartfelt moment where she reveals her age and expresses her concern for his well-being. Their bond deepens as they acknowledge their mutual dependence and trust.

Elsewhere, Hijiri suspects that someone is targeting the students of Class 2-C for murder, hinting at a larger conspiracy. Kashima reunites with Sogou, who is determined to grow stronger to protect her friends, while Asagi Ikusaba watches over her with a mix of concern and hidden motives.

Finally, Touka's group arrives at the domain of Erica Anaorovael, the Witch of Taboos. Hoping she can decipher the scroll of forbidden magic, they ask for her assistance in their quest for revenge against the goddess Vicius. The episode concludes with Vicius learning of the Great Demon Empire's movements and eagerly anticipating the heroes' return, setting the stage for the coming conflicts in a potential Season 2.