When Xi Zhonghe got dumped five years ago, Gu Tang was there to witness it and helped him to get over the heartbreak. But when Xi Zhonghe got into a car accident and lost his memory of the rejection, he didn't remember Gu Tang anymore and he wanted to get back together with his ex instead. Gu Tang: "......."

(Source: Bilibili, translated)

Note: Includes prologue and eight extra chapters.