"Denpa teki na Kanojo" is a two-episode OVA series adapted from the light novel of the same name. The narrative centers on Juuzawa Juu, a high school student with a delinquent reputation, and Ame Ochibana, a mysterious girl who claims to have been in love with him since childhood. The story unfolds in a dark, psychological thriller format, blending elements of mystery, suspense, and supernatural undertones.

In the first episode, "Koufuku no Kane," Juu encounters Ame, who declares herself his "knight" and vows to protect him. Their relationship takes a sinister turn when they become entangled in a series of murders at their school. The victims are connected by a shared past involving bullying, and the killer is revealed to be a former classmate seeking revenge. Ame's unsettling demeanor and unwavering loyalty to Juu add layers of tension, as her actions often blur the line between protector and manipulator. The episode concludes with the resolution of the murder case, but Ame's true nature remains ambiguous.

The second episode, "Kimi ga Mamoru, Kimi ga Korosu," delves deeper into Ame's enigmatic past. Juu and Ame investigate a string of disappearances linked to a cult-like group. The group's leader, a charismatic but dangerous individual, targets Ame due to her traumatic history with the organization. As the investigation progresses, Ame's psychological scars and her connection to the cult come to light, revealing her motivations and the extent of her devotion to Juu. The episode culminates in a confrontation that tests their bond and raises questions about morality, justice, and the cost of loyalty.

The series is characterized by its atmospheric tone, intricate plotting, and morally complex characters. Juu serves as a grounded protagonist, balancing Ame's erratic behavior with his own sense of justice. Ame, on the other hand, is a deeply flawed yet compelling figure, whose actions often challenge conventional notions of right and wrong. The interplay between the two leads drives the narrative, creating a dynamic that is both unsettling and captivating. The OVA's concise format ensures a tightly woven story, though it leaves room for interpretation regarding the characters' futures and the true extent of Ame's intentions.