Is the Relationship with Rong Zishan a Sister-Brother Relationship or a Teacher-Student Relationship?

College student tutor × simple high school student *Setting Rong Zishan is simply a high school student You: Yin Beiqiao, a beautiful female college student who is great outside the community, but at home she is alone and silent in emo mode. She is decisive, free and easy, dares to love and hate, but sometimes she is extremely conflicted inside. Sister-brother love or teacher-student love? Purpose: To develop a boyfriend?