Love Against My Will: I Fell for My Girlfriend's Younger Brother

Like every young person who comes from a small town, Chen Zuoqing, a graduate of a prestigious university, has watched his dream change from becoming a "scientist" to becoming a man who meets the standards of modern society: owning a house, a car, and a wife. He now has a car and a house, and his girlfriend has finally agreed to introduce him to her parents. But then a troublesome future brother-in-law comes along.

Premise: I only wanted to get married and have kids like a normal person. Then I met you, and being normal stopped mattering.