He is 5 years older than her, and he and her brother are better friends. She has followed her since she was a child, and he is called closer than her real brother.
"Brother Sheng, can I be your wife when you grow up?"
"No, I don't want you to cry so much"
"If I don't cry in the future, you can't let me go, woo woo woo"
"Woooooooo..."
"Okay, I just want you, don't cry anymore, be good..."
"..."
Later they separated, and when she came back, he was still waiting there... The female protagonist was absolutely sweet and pampered but not abusive, and was cold and powerful (not including in front of the male protagonist). The male protagonist was arrogant, sinister and doted on Tiantian?