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I'm Minoru Kudo, a dull office worker. It was faster to count the sales results from the bottom, and he was always scolded by his strict boss, Mr. Mito. It was painful to get angry every day, but I was helped many times by the follow-up of another gentle boss, Mr. Komatsu. One day, when I work overtime, they invite me to drink. After being forcibly taken out, I was asked to stay because they missed the last train. I decided to stay with a faint expectation, but on that day, the longest night in my life began ...