They meet unexpectedly, but he falls in love at first sight and pursues her closely. She secretly promised him but was deterred by the shadow of her past. In the end, inspired by her perseverance and sincerity, she accepted him. Just as the two were living a sweet world together, a birthday party pushed their relationship to the forefront. A peaceful breakup resulted in heartbreak for both couples. After meeting many years later, I wonder if they can renew their relationship...