After arguing with her boyfriend and running out of her apartment, Yui finds herself trapped inside the elevator with a salaryman who lives in the same apartment building. The emergency phone doesn't work, and they can't use their smartphones to call for help, so they end up waiting for help. Time passes, but the elevator doesn't respond at all, and the two of them get anxious, so they lean closer to each other and touch each other. They hadn't even had a proper conversation until just now, but they're pressed together in the small elevator, covered in sweat and seeking each other.