It happened one night during a business trip. I left the restaurant with plenty of time to spare, but I got lost and ended up missing the last train right in front of me. It was too far to take a taxi home, and I was in such an isolated location that there were no business hotels available... The only place I could find vacant was a love hotel. And there was only one room available. It was impossible to spend the night in the cold midwinter sky, so I had no choice but to spend the night in the same room... but I never expected something like that to happen...