Before Rebirth, I Fell in Love with Studying

[No CP (with emotional line) + rebirth + campus + system + reversal + redemption] "There are fir trees in the south. Hello everyone, my name is Nanshan." Nanshan, who had accomplished nothing at the age of 30, died unexpectedly and was reborn in high school. She decided to work harder to make up for the regrets of her previous life; Unexpectedly bound to the learning system, unlocking more skills, she decided to master them all; But discovered the secret about her and another girl There is actually another system! Her sister actually had memories of her previous life and helped her fight against the family turmoil! In this life, in this battle for destiny, how can she get her own destiny back?