"20 second date" is a mystery-like love story depicting the apartment elevator on stage. The boy living on the seventh floor of the apartment lived in the same apartment and had a favor with a girls high school student who never knew they would get into the elevator from the 6th floor all the time. It was a boy who began to investigate about the inhabitants of the 6th floor whether they managed to get to her somehow, but it turned out that there were no families with high school girls on the 6th floor.