JYP is a private high school, but inside the school there is a mini academy call 'Big Hit'. Although they they used to be classified as the same school many years ago they have split up into two, but Big Hit cannot afford rebuilding because it is small they still share the same property.

Micha and Sunhi both start their first year of high school but not exactly together. And when their new school life turns out to be different then what they expected, will they ever experience an ordinary day of school again?