What my teacher said reminded me of・・・

Last week, my English teacher asked me a strange question that was how to prevent me from hangover. Soon after his question, I came up with my memory during job-hunting.
On the next day of drinking session in Sakai, Osaka, Japan, I participated in an explanatory meeting with hangover.
After that, I met a friend in my department by accident in underground shopping area. How idle I was then.