Chapter 1 Past is past right?

Agnes and Margo were friends, Agnes being one of the students that pass and usually being mocked and laughed at, and has never fall inlove.Margo a girl that excel in academics, a level honor and a muse and had 3 MUs in 4 years. But when Agnes falls inlove, Margo seems to envy that idea and will try to win Agnes' crush. What may be the cause of Margo doing these sceams