Eun Sun (you) is a 16 year old girl who thinks life is easy as long as you live it like it is and nothing hadelt plan ahead but spontaneous. Hana your best friend is planning ahead of everything. Even if that does not really suits you it is your best friend. You go through thick and thin. But that changes when new students come to your school.
Although you have not interested, but Hana already. Your best friend moves away further from you. First you have not noticed, but then you realize it . You have to do something.
Otherwise you could lose your best friend to the new students.
Now you must fight for your best friend.