As a multi-controller, Qiao Mu originally thought of hooking up with this little brother with a nice voice. But what the hell is it that suddenly turns into a little brother in junior high school? It's a slap in the face.
Su Ming doesn't care who his brother is, he just chases after him if he likes him. What's more, this is his own territory, so he can still run away?
All in all, this is a sweet story about sister-brother love.