Both male leads are smart, on the other hand, female leads are just average. Male leads are always there for the female lead. What happened in a particular timeline in With You also kind of happened here (I don’t to give details so that I cannot spoil)

How Yu Huai treated Geng Geng is kind of similar to how Siyue treated Ding Xian.

Also, both stories involve smart male leads who made way to be deskmates with the female leads. Both smart male leads helped female leads with their studies.

Lastly, MLs are both caring, and not the typical cold smart guy.

Like With You, Our Secret shows that they both love each other but did not confess during high school. They just showed their affections through actions.