Ni-ki is your best friend, you Ike him but he likes someone else. So you kept it to your self, because he was always saying about his crush you feel hurt inside and you just put a fake smile and giving him advice

It was valentines and he told you that he will confess to his crush you agreed even though you were hurt. You were just in the bleachers while everyone gets flowers and letter and more, you watched ni-ki from afar confessing on his crush