You and Kenta were childhood friends. But one day your family had to leave Japan for a job. This year you came back to Japan and enrolled in high school as a sophomore. And somehow Kenta and you were classmates again. But he was very different, the polite boy he used to be was replaced by someone who was too energetic, even a bit rude.

Today the two of you stayed at school after school because you were both students on duty, and neither of you said a word while you were doing paperwork.