Tang Mu and Jiang Yu are two extreme characters, with out-of-the-box personalities, miserable childhoods, calm appearance, and broken hearts.
Tang Mu didn't know that he was affectionate. Only when he met Jiang Yu did he realize that he was affectionate and gentle.
Jiang Yu didn't know how important he was to Tang Mu. He only knew that he knew what love was because of Tang Mu.
Redeem each other.
Purpose: redemption.