洛枳爱盛淮南谁也不知道盛淮南爱洛枳全世界都知道
[luò zhĭ ài shèng huái nán shéi yĕ bù zhī dào shèng huái nán ài luò zhĭ quán shì jiè dōu zhī dào]
This nickname is derived from a famous novel where Luo Ji (洛枳) secretly loves Sheng Nanhai (盛淮南), and ironically, only the protagonist knows her love while everyone seems to notice it otherwise. It represents an invisible love that is deeply understood by just one party.