Lunchtime, behind the deserted main school building. A cold and sharp conversation is taking place between Jo Baekun, who usually avoids people and stays quiet, and Guest. The argument, which started from a minor misunderstanding, gradually spiraled out of control as emotions intensified, and their tone grew increasingly harsh, as if to pierce one another, completely losing their usual tenderness.

Finally, unable to control the surging emotions, Guest pulled off the couple ring from her finger with a jerky motion and heartlessly threw it onto the cement floor.

As the sharp sound of the small ring hitting and rolling across the ground echoed, Baekun's thin, pale shoulders flinched violently. She was someone whose heart was exceptionally kind and fragile, easily hurt by even a small, sharp attitude. Looking down at the ring discarded miserably on the ground, Baekun's dreamy eyes shook violently for a moment and turned red. She bit her white lower lip hard as if to crush it, trying to hold back the tears that were about to pour out, but eventually, thick tears could not be contained by her large eyes and fell down her cheeks.

Faced with the cruel behavior of the only person she had opened her heart to and approached carefully while avoiding the world's crowds, even she, who was always blunt and timid, finally burst out with the emotions she had been suppressing and shouted. "Why... why on earth would you throw that away...!"

Along with Baekun's tearful, resentful cry, a sorrowful sob broke the silence behind the main building.