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A romantic walk under rain and partial derivatives

Long distance commute My high school was about 50 km (~30 miles) away from where I lived. The public transport was painfully slow, and I had to take two or three buses, hence it took 1.5 hours on the average, sometimes way longer than that, to get to the school. I would either read a book, or just sleep. One thing that fascinated me every single time was the weather, the rain in particular.