For some reason, Yao Yao likes black shadows and also likes the night best, because the guiding light can illuminate her shadow.
Yao Yao likes to talk to Shadow just because she only has one friend.
The teachers all said that Yao Yao didn't get along with others. They didn't know that Yao Yao had no friends.
Parents say that Yao Yao is lonely and taciturn. They don't know that Yao Yao is actually very lonely.
But Yao Yao knew that the shadow would accompany her throughout her life, inseparable.