"The Laughing Target" is a supernatural horror anime that revolves around the unsettling consequences of a childhood promise. Yuzuru Katori, the protagonist, is a young man who returns to his hometown after a long absence. His arrival rekindles a dark connection with his cousin, Azusa, who has harbored obsessive feelings for him since childhood. Years earlier, Yuzuru and Azusa were engaged in a ritualistic promise of marriage, a pact made under the influence of their families' traditions. However, Yuzuru left the village, breaking the promise and leaving Azusa emotionally scarred.

Azusa's unresolved feelings manifest in supernatural ways, as she becomes a vengeful spirit driven by jealousy and despair. Her transformation into a malevolent entity is triggered by Yuzuru's return and his growing relationship with his girlfriend, Satomi. Azusa's powers escalate, leading to a series of violent and eerie events that threaten Yuzuru and those around him. Her actions are fueled by a mix of love, hatred, and a desire to reclaim the bond she believes was stolen from her.

The narrative explores themes of obsession, unfulfilled promises, and the destructive nature of unchecked emotions. Azusa's descent into madness is portrayed through her increasingly erratic behavior and the supernatural phenomena she generates, which blur the line between reality and illusion. Yuzuru is forced to confront the consequences of his past actions while grappling with the moral dilemma of how to stop Azusa without further escalating the tragedy.

The story builds toward a climactic confrontation between Yuzuru and Azusa, where the full extent of her powers and the depth of her obsession are revealed. The resolution underscores the tragic nature of their relationship, as the consequences of their childhood promise culminate in a haunting and inevitable conclusion. The anime's atmosphere is steeped in tension and unease, emphasizing the psychological and emotional turmoil of its characters.