Chen Yuchu's friends and classmates all know that she likes Gu Pingan
Gu Pingan's friends all saw that Chen Yuchu liked Gu Pingan
The whole world knows that Chen Yuchu likes Gu Ping'an
Gu Pingan also knew that Chen Yuchu liked him
But Gu Ping'an knew and pretended not to know.
Concept: A story about secret love