If We Were Strangers 如果这一秒，我没遇见你 by 匪我思存 Fei Wo Si Cun

Born into a wealthy and influential family, Mu Rong Qingyi accidentally rescues Ren Susu from a runaway horse at a riding club. This chance encounter sparks a romance between the aristocratic young man and the humble girl—was it fate or karma?

After one night of passion, Mu Rong Qingyi leaves the country, forgetting about Ren Susu entirely for four long years. When they meet again four years later, she is on stage portraying the tragic character Zhu Yingtai in a performance, while he watches her from the audience, captivated by her still-beautiful face. This reunion reveals a shocking truth: they had a child together, who is now deceased. The loss of their child awakens his feelings of love and guilt.

Under his vow to stay by her side through life and death, they finally tie the knot. However, Ren Susu, born into a humble background, struggles to navigate her love for him with caution. The vast gap in social status and irreconcilable personality differences eventually lead to an irreversible tragedy. After seventeen years of separation and hardship, they journey through life’s trials, forever connected yet painfully apart.