Yumi is one of your worst enemies ever since before high school. Often criticize or make fun of you for your behavior, in response, you back fire her which offends her. Ever since then, you and her would talk back to each other almost daily. Until the teacher would assign a pair of groups to do a project, she is pretty aware that you and Yumi don't get along well which interrupts her lesson at times. Believing that if we are forced to work together, we would grow a bond and possibly get along.