"Tsuiteru Kanojo" centers on the life of a young man named Haruto, who becomes entangled in a peculiar and unsettling relationship with a girl named Aoi. Aoi is deeply infatuated with Haruto, but her affection manifests in obsessive and controlling behavior. She begins to stalk him, infiltrating his daily life and manipulating situations to ensure his dependence on her. Haruto, initially unaware of the extent of her fixation, gradually realizes the depth of her obsession as her actions grow increasingly invasive and dangerous.

The narrative explores themes of love, control, and psychological manipulation, as Haruto struggles to navigate the suffocating dynamic Aoi imposes. Aoi’s actions blur the line between devotion and possession, creating a tense and unsettling atmosphere. Her character is portrayed as both sympathetic and unnerving, as her backstory reveals the roots of her obsessive tendencies, adding complexity to her motivations. Haruto, on the other hand, is depicted as an ordinary individual caught in an extraordinary and distressing situation, his attempts to break free from Aoi’s grasp often met with escalating consequences.

The story delves into the psychological toll of such a relationship, examining how Haruto’s sense of autonomy erodes under Aoi’s relentless pursuit. The manga also touches on societal perceptions of love and obsession, challenging the romanticization of extreme devotion. As the plot progresses, the tension between the two characters intensifies, leading to a series of confrontations that test the boundaries of their twisted connection. The narrative maintains a focus on the emotional and psychological stakes, creating a compelling and often unsettling exploration of human relationships and the darker aspects of love.