Uka Ishimori is a shy and insecure girl who endured a hell of a time in middle school due to bullying, withdrawing completely into herself to the point of becoming rigid as a statue. When she starts high school, her only desire is to go unnoticed and make a minimal change in her life, but her plans are derailed when she meets Kai Miura, the most popular boy in school: lemon-blonde hair, a bubbly, direct, and completely unpredictable personality. Against all odds, Kai notices Uka's loneliness and begins to shake her out of her shell, caring for her without too many compliments and encouraging her to make true friends. Between small steps outside their comfort zone, schoolyard misunderstandings, and a sweetness that slowly melts away their fears, a love story is born as fresh and passionate as a lemonade, capable of healing the wounds of the past and restoring self-confidence.