From the outside, Hanabi Yasuraoka and Mugi Awaya appear to be the ideal couple. However, their reality is far from perfect as they share the same burden of unrequited love for others. Hanabi has harbored feelings for her childhood friend and neighbor Narumi Kanai for as long as she can remember. When he becomes her homeroom teacher, she is overjoyed. Unfortunately, Narumi develops a relationship with the music teacher, Akane Minagawa, leaving Hanabi heartbroken. Mugi was smitten with Akane since their time together in middle school. A chance encounter with Hanabi leads the two lonely individuals to seek comfort in each other, using physical intimacy to fill the void of their unattainable loves.