"Kokoro Connect" is a manga adaptation of the light novel series written by Sadanatsu Anda and illustrated by Shiromizakana. The story centers on five high school students who are members of the Cultural Research Club: Taichi Yaegashi, a kind-hearted but impulsive leader; Iori Nagase, a cheerful and outgoing girl with a complex past; Himeko Inaba, a sharp-tongued and pragmatic individual; Yoshifumi Aoki, a laid-back and humorous classmate; and Yui Kiriyama, a petite and athletic girl with a strong sense of justice. Their ordinary lives take a dramatic turn when they begin experiencing supernatural phenomena that force them to confront their deepest fears, insecurities, and hidden emotions.

The first major event occurs when the group suddenly starts swapping bodies at random, a phenomenon they dub "Body Swap." This inexplicable occurrence disrupts their daily lives and forces them to navigate each other's personal struggles, relationships, and identities. As they grapple with the challenges of inhabiting one another's bodies, they begin to uncover secrets about themselves and each other, leading to moments of vulnerability and conflict. The group learns that these phenomena are orchestrated by an enigmatic entity known as Heartseed, who claims to be conducting experiments on human behavior and emotions.

Following the Body Swap incidents, the group faces additional supernatural trials, including uncontrollable outbursts of suppressed desires, time loops, and memory alterations. Each phenomenon serves as a catalyst for character development, pushing the protagonists to confront their inner demons and strengthen their bonds. Taichi, for instance, struggles with his tendency to prioritize others over himself, while Iori grapples with her fractured sense of identity and fear of abandonment. Himeko's guarded nature and deep-seated insecurities come to light, as do Yui's struggles with her self-image and past trauma. Yoshifumi, though often the comic relief, reveals his own vulnerabilities and emotional depth.

Throughout the series, the relationships between the characters evolve in complex ways. Romantic tensions emerge, particularly between Taichi, Iori, and Himeko, creating a love triangle that adds emotional weight to the narrative. The group's dynamic is further tested by external pressures, misunderstandings, and the psychological toll of Heartseed's experiments. Despite these challenges, the characters gradually learn to trust and support one another, forging a deep and enduring friendship.

"Kokoro Connect" explores themes of identity, self-acceptance, and the complexities of human relationships. The supernatural elements serve as a vehicle for examining the characters' emotional and psychological struggles, making the series both a compelling drama and a thought-provoking exploration of the human condition. The manga adaptation effectively captures the emotional depth and interpersonal dynamics of the original light novels, offering a visually engaging and narratively rich experience for readers.