This is a regrettable story. A girl has always been secretly in love with a boy. She chose the science subject that she was afraid of for him. She just hopes to be in the same class with him and get closer to him. However, the boy always seems to be aloof. The girl is very confused whether he likes her or his childhood sweetheart. The boy is always reluctant to express it. The girl guesses the boy's heart all the time. It takes six years to understand...