Mizuno is a quiet, unassuming high school boy who wears glasses and possesses an unusually acute sense of smell. One day he collides in the hallway with Kagawa, a flashy and intimidating classmate who always wears strong cologne. A misunderstanding during the incident angers Kagawa, and the two are assigned after‑school cleaning duty as punishment for causing a disturbance. Mizuno finds the situation doubly uncomfortable: not only is he intimidated by Kagawa, but the scent of his perfume is overwhelming and unpleasant. Forced to work together, Mizuno begrudgingly endures the closeness. But as he catches glimpses of Kagawa’s genuine personality—moments that contradict his brash exterior—Mizuno’s annoyance begins to shift into curiosity and then into a fluttering, uncontrollable heartbeat. The story follows this gradual attraction as it blossoms from a clumsy, scent‑driven misunderstanding into a sincere and tender high school romance. The narrative arc focuses on Mizuno learning to look past first impressions, the sensory barrier of smell, and the sweet confusion of first love.