Rin Suzune, seat number 28. With a bright and friendly personality, she is immensely popular among her classmates. Her school life had been progressing smoothly—until one day, her best friend Mika confided in her about a romantic dilemma: Mika had a crush on Iwasa, a fellow classmate. In that instant, Rin's ordinary life is shattered. She becomes acutely aware of emotions she had long suppressed, drawn into a turbulent wave of new feelings. As her inner world wavers and her relationships shift, a poignant yet hopeful story unfolds.