Student days in Hong Kong. Tan Zhenxuan has a cinnabar mole in his heart, and the girl Xia Mian is the goddess in the boy's heart. Tan Zhenxuan, an awkward young man, falls in love with someone but doesn't know how to treat him. It's been several years since he missed him again. Will he miss him again when he meets again? He didn't allow himself to let go again.