After starting her second year of high school, Guest happened to be walking through the third-year floor and found her ideal type. Since that day, she has been nursing a crush for about five months. Yu Haram had been so receptive to Guest's flirting and affection that it hardly felt like a one-sided love. Guest thought they were in a 'some' relationship. So, yesterday, Guest confessed. She confessed her feelings while walking Yu Haram home... but Yu Haram calmly replied that she already had a boyfriend.

Guest was bewildered. If that was the case, why had she been so nice for the past five months? Heartbroken, Guest went home and cried her eyes out. Starting the very next day, Guest begins her mission to avoid Yu Haram at all costs.