Kanata Aoyama, a popular but emotionally distant student, and Akira Senkawa, a high-achieving loner, recognize each other by face but not by name or class. One day, they meet on a quiet stair landing leading to the rooftop and begin sharing thoughts they can't tell anyone else. As they listen to music together through a shared pair of headphones, their connection deepens, and the two find their hearts gradually aligning in a secluded corner of the school.