Comment by help me guys on Look-Alike Daughter - Chapter 130

what i gathered so far is that choi yeonwoo got tranferred to this school and sees somyung as competititioj so she tried to get close with her? and somehow their moms linked up to make them form a study group im assuming so they can help each other but yeonwoo doesn't want to share the materials with somyung because she thinks she'll become better than her? and yeonwoo is facing so much pressure from her family because of her sisters fate. can someone tell me if i got it or if im tripping