Buses and Heart-throbs

In my usual seat on the commuter bus, the boy and girl with the school badge from the other day came near me again this morning.
“Good morning.”
“Morning.”
I was excited, wondering if I might get some material for my writing again, but the driver said over the microphone, “Please move further inside, one step at a time.” There were a lot of passengers.
The two of them went not just one step, but quite far back. So, I have no idea what they talked about this morning.

I also used to take the bus to school when I was in high school.
At first, I took a bus that left with a bit of time to spare, but the traffic was worse than I thought. Even though it was only a twenty-minute trip to school, it took over an hour.
On top of that, the bus was packed like a can of sardines the whole time; it was absolutely insane.
I soon decided to leave much earlier and take the first bus of the day. If I took the first bus, the roads and the bus itself were empty.
I always sat in the seat behind the boarding door. The other passengers also seemed to sit in the same seats every morning.
One morning, while I was waiting for the bus to depart in my usual seat, a young woman I didn't know sat down next to me. She was a plain-looking, quiet-seeming woman.
Shortly after the bus started moving, the quiet woman began to doze off and gradually leaned against me. Her head rested gently on my shoulder, and for some reason, my heart started racing.
The quiet woman slept like that for a while, but at the stop in front of the station, she opened her eyes wide and got off the bus as if nothing had happened. All that was left behind was my own heart-throb.
The next morning, the quiet woman sat next to me again, dozed off, and leaned on my shoulder. And just like that, my heart started racing again.
After that went on for a few days, my classmate Sawada suddenly came and sat next to me.
“...Sawada, why are you sitting there?”
“Huh?”
Sawada made a blank face. Seeing that, I thought, 'You jerk.'
Then the quiet woman got on the bus. She glanced at our usual seat, but there sat the lanky Sawada with his blank face.
The quiet woman went to a different seat, and after that, she never sat next to me again.
Sawada passed away a long time ago, but even now, I still think of him as 'that jerk.'