Komori is an elite office lady with a unique ability to loop time in small increments. One day, a sudden accident causes her limit to rupture, sending her back a full decade to her high school years. She finds herself face to face with a boy she has carried in her heart for years: a cheerful, nerdy classmate she once admired from afar. Yet her most vivid memory of him is not his smile but the sight of his lifeless body, a death she failed to prevent. Now, thrown into her own past, Komori is given a second chance to rewrite the tragedy. The story explores the consequences of her actions through the lens of chaos theory, quantum mechanics, and the idea of multiple timelines, as she grapples with the butterfly effect of each change she makes. Caught between her adult consciousness and her adolescent surroundings, she must navigate old relationships and hidden dangers while racing against time to save the person who once meant everything to her.