Did you... meet Kushiro-sensei during your time as a back-alley doctor?

No, Sensei and I got to know each other... around the time we were both still working at the university if I remember correctly.

That was over 20 years ago now. We were all so young back then...

...I feel like

it's a bit of a waste.

If Sensei continued his research in the surface world,

he would be remembered as a scientist instead of a politician... I think.