Ochiba - Falling Leaves

At 17, Kai starts his second day at Yamada High, but his past weighs heavy. Two years ago, he collapsed on the basketball court from sudden lung failure, discovering a rare birth defect—one necrotic lung. After surgery to remove half of it, he's supposedly cured, but daily struggles with fatigue and fear haunt him. His ex-girlfriend left him due to his school delay, and every breath feels like a question: what if this happens again? A poignant tale of resilience and the fragility of youth.