All the talk about mc not underestimating anybody and look where it got him... Also his rage was not really that big when he didnt kill the guy. Cripling important vilain in a world of quirks is like saying, here have a vacation and come back to make my life harder later.
speaking of rokushiki does he not know tekkai? would have thought he would have learned it already durring childhood or remembered it after seeing kirishima's hardening quirk
Hmmm this was good but it could have been better if you wrote this chapter from the protagonist's or Stein's point of view. It would have livened up the emotions a lot, and made it not feel as empty. It would have also deepened the character of the protagonist too.
Thanks for the chapter broo PS: could you be another fanfic of boku no hero but this time the mc has the quirk of the mutant vulcan x men you can look for him