Axun wrote "Physics Notes" on the cover of this diary so that no one would ever want to open it. They even put it in a dark shell and wrapped it in expensive cowhide to make it look as cheap as possible. Axun's love for Qiqi is so secretive, obscure, and hard-working that it makes the relationship look like everything is normal. But things are not that simple, just like Qiqi is not something a middle school student can simply cover up with a cheap plastic book cover.
Intention: relationship