Past Agreement

When they were children, he and she were best friends, watching the sunrise together, going to haunted houses together, riding roller coasters together, and going to the beach together... One day, she and he agreed to grow up together. However, she moved on that day, and he could no longer see him. One day later, they met again. Just when they were about to recognize each other, an uninvited guest came. Who could it be? Let's discover the answer with the author. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.