For An Jiu Sheng, Qu Yukai is special. He is like an oxygen tube, the best device when An Jiu Sheng is too sad to breathe.
However, Liang Jingxi is indispensable. His existence is oxygen, so thin that he can't breathe.
"I don't know what love is, but I met you."
"I've always only had you."
Concept: Adolescent love will be painful, but beautiful.