Park Noa met Yun Seri when he was a senior high school. Yun seri was still in last year of her junior highschool.. Park Noa already saw and notice Yun Seri when they cross path while riding their bikes, Park Noa can't help but to like her at that moment and he was given a chance to met her and luckily win her heart. But due to childish reasons Park Noa just avoid Yun Seri without letting her know and later on, regrets what he does and cant get over with it.