Choose Me for Your First Love, I'm Super Sweet

Three months later, Gu Qingchang cornered Su Qingying against the door and pinned her there. “You’re the only person in the world I could ever fall for. So either you marry me or I marry you. I’m fine with either!”

Su Qingying sneered. “Didn’t you say I shouldn’t even think about anything else?”

Gu Qingchang raised a hand and slapped himself across the face, then explained calmly, “I like face-slapping. What’s wrong with that?”

Su Qingying: “…”

(The hero is severely face-blind and is constantly face-slapping himself in front of the heroine. Extremely doting and sweet.)