Watari-kun's ****** Is about to Collapse

Naoto Watari's life has been a precarious balancing act ever since the sudden death of his parents two years ago. Now living under his aunt's roof alongside his younger sister, he has shouldered the burden of protector with a fierce, almost obsessive dedication. His single-minded devotion to his sister's well-being has earned him a reputation around town as the quintessential "sister-complex" guy—a label he wears with indifference, because in his world, her safety and happiness are the only priorities that matter. Just as Naoto begins to find a fragile equilibrium in his new routine, the past crashes back into his present in the form of Satsuki, a childhood friend whose relationship with him has soured into something resembling bitter enmity. When she transfers to his school, the fragile peace he has constructed starts to fracture. Satsuki's sudden reappearance is not merely an awkward reunion; she seems determined to unravel the careful threads of his life, forcing him to confront old wounds and buried truths. However, Naoto soon realizes that Satsuki is only the first tremor in a coming earthquake—a sign that his carefully guarded world, built on sacrifice and silence, is about to collapse entirely.