Ureshino Haruka, a first-year junior high student, enters an enigmatic castle through a magical mirror, escaping his isolated reality. Socially withdrawn, he avoids peers after enduring months of coercion by classmates who demanded daily monetary gifts—a pressure that strained his relationship with financially oblivious parents and reduced him to a servant-like role until his refusal led to abandonment.

Inside the castle, his awkward attempts to pursue romantic connections with female peers highlight his desperation for acceptance, though his clumsy advances yield only discomfort. These efforts contrast sharply with his guarded nature, underscoring a struggle to bridge genuine human connection. Reluctant collaboration in the group’s quest for a hidden key gradually exposes his vulnerabilities, particularly fears of exploitation rooted in his past.

Anchored in 2026 while others inhabit different eras, Haruka’s interactions with the group reveal layered insecurities—fear of rejection wars with yearning for authentic bonds. His journey converges with others in a climactic confrontation of shared traumas, fostering mutual empathy. The castle’s surreal environment mirrors his internal shift from defensive isolation to tentative steps toward trust.

His defining statement—“I’m not good at making friends, but pretending to be happy isn’t something I’m good at, either”—captures his resistance to performative social masks, framing his conflict between self-protective solitude and an unspoken hunger for true belonging.