The Emperor Who Wants the Surname Guan Su

The naive Su Mumian accidentally picked up a tsundere uncle and began to fall in love with Niu Tanqin. "I'm Su Mumian, what about you?" "I'm Si Nian." I want you to give me your last name. "I want this, please put it on for me." A certain uncle stretched out his left hand and raised his ring finger. Su Mumian took the ring and put it directly on his ring finger: "Okay." A certain uncle leaned forward: "Well, I'm very satisfied. I will be yours from now on." Su Mumian was confused:... "What's mine!" "Of course it's me..." A certain uncle said a word that only he could hear.