Shen Sijin's regret was that she couldn't get Jiang Nian'an.
No matter how hard she tried to pursue him, she never got what she wanted.
Eventually, she gave up.
Later, she met a boy.
Ling Zhimo, a good-looking boy who could call her sister, act like a baby, was two years younger than him.
However, Ling Zhimo fell in love with Si Jin a long time ago.
After his "attacks" again and again, Si Jin couldn't stand it anymore (whoever else could withstand it)
Si Jin: Forget first love, I love my younger brother
"Zhimo, look, I like you so much, do you like me?"
"Sister, if you like me, marry me."
"Zhimo will always love my sister."
"Sister, Zhimo finally got a sister."
Intention: You must cherish your sweetheart. Regret is a lifelong matter