Before the two were born, their parents had already made an agreement:
No matter whether two people are alpha beat or omega, they must match each other when they grow up.
Xiao Yiran also liked Jiang Guan since he was a child. Later Jiang Guan also found out that he also liked Xiao Yiran. But he thought Xiao Yiran regarded him as his brother, but he wanted to date Xiao Yiran. He felt sorry for Xiao Yiran, so he started to stay away from Xiao Yiran. Little did he know...
Purpose: to kill some time