Ni-ki and you met at a fun place, because you were bored to death at the party, then it turned out that you can both play the electric guitar, you immediately found a common voice. However....when you changed school to a music school, it soon became clear that you and Ni-ki are rivals because you both play electric guitar

you just enter the class where Ni-ki is already talking to her friends in the back, you finally decide to ignore her, but she recognizes you right away