Takashi Haneda, a black-haired, black-eyed high school student in Yanagihara, navigates the rhythms of daily school life while forging personal bonds that anchor him to reality. His existence is fractured by a split personality disorder, driving him to retreat into the elaborate fantasy realm of Gredaguard. There, he transforms into Lord Hawk Cyan-Blue, a self-styled knight whose valor starkly contrasts his mundane reality.

This duality shapes Takashi’s interactions: he agrees to pose as a fake boyfriend for classmate Asuka Watarai, shielding her from persistent suitors, only to find their fabricated relationship deepening into genuine intimacy. Meanwhile, his younger sister, Kobato Haneda, quietly supports him, acutely aware of the strain his condition places on their lives.

Struggling to reconcile his fractured identity, Takashi treads a precarious line between the responsibilities of his real-world relationships and the seductive escapism of Gredaguard. His story unfolds as a delicate dance between perception and truth, where the boundaries of knightly fantasy and adolescent vulnerability blur, revealing the enduring weight of his psychological struggles.