I was so tired that I felt asleep when I boarded a train on Midosuji Line.
Usually, I would wake up at the station at which I intended to get off. But, today, I didn't notice that the train got to Namba, where I intended to get off. After that, I woke up at Hommach. So, I had to return to Namba.
I should have set the alarm of my cellphone.
