Picked up by the Top Student Sister and Brought Home

The writing is terrible, I don't recommend reading it. The first time I met Cheng Jing, she was blocking the girl who was chasing me at the door of the classroom. "Sorry, my brother can't fall in love prematurely." She was as serious as a dean. After being forced to call her "sister" for three years, I finally got admitted to her university. On the day of registration, I pushed her behind the door of the dormitory: "There is no talk of puppy love now, right, senior sister?" Cheng Jing pushed me away in a panic: "Don't make trouble... I failed in my postgraduate entrance examination." I chuckled: "Just in time, I'll accompany you in World War II." She didn't know that I deliberately missed 30 points of questions.