With the recent deregulation, many individual drivers have entered the so-called "ride-sharing service". Even in our household, where we have been struggling financially due to the salary cut of the main job, my wife and I started ride-sharing business as a part-time job with a used private car. We were delivering drunk customers who returned from bars, but the income was much higher than expected, so my wife and I were working hard on the part-time ride-sharing business, but...
