Kōichi Tsujii, the elder sibling in the Tsujii household, navigates the turbulent waters of academic ambition amidst the relentless chaos stirred by his brother Sōichi. A diligent student, Kōichi’s efforts to concentrate are perpetually thwarted by Sōichi’s supernatural mischief—raucous disruptions and eerie pranks that their parents dismiss without intervention, forcing Kōichi to confront the turmoil single-handedly. In one chronicled episode, the family erects a soundproof study to shield Kōichi’s focus, only for Sōichi to undermine its purpose by carving labyrinthine tunnels within the walls. From these covert passages, Sōichi unleashes piercing cicada shrieks, clawing at Kōichi’s fraying patience. Yet, even as Sōichi’s antics escalate into perilous traps, Kōichi reluctantly steps in to rescue his brother from self-inflicted disasters, balancing resentment with reluctant loyalty. Their relationship crystallizes Kōichi’s burdened duality: a steadfast guardian straining under the weight of responsibility, trapped between quiet aspirations and the bedlam Sōichi thrives in. Their clashes lay bare the fractures of overlooked familial bonds and the corrosive endurance required to withstand ceaseless disruption.