Ivy League Survival Guide

In childhood, the youngest daughter of the wealthy Lin family, Mu Xue, and the daughter of the ordinary Jiang family were accidentally swapped. Twenty years later, Jiang Jingjing (the real Lin child), raised in the Jiang family's extremely patriarchal and neglectful environment, got into college while being harassed by her perverted brother. Meanwhile, Lin Muxue (the real Jiang child) lived a life of luxury. They attended the same university, and because the boy Lin Muxue liked had feelings for Jiang Jingjing, Muxue insulted Jingjing. Unexpectedly, the teacher called to rescue her was her ex-boyfriend, Lin Feihan. They met by chance at a convenience store, and due to Feihan's gentlemanly concern, they slept together after drinking. Jingjing, greedy for the warmth of being saved, maintained a friends-with-benefits relationship for a year until they broke up due to misunderstandings. They met again at university; after Feihan scolded Lin Muxue, he couldn't help but care for Jiang Jingjing, but his kindness was rejected. Feihan sought Jingjing out to understand the situation, only for her to discover he was her new teacher.

Synopsis from DramaGo.