Ichioku-nen Button o Renda Shita Ore wa, Kizuitara Saikyou ni Natteita ~Rakudai Kenshi no Gakuin Musou~ - Vol. 2 Ch. 8.1

[Psychronia]

Aww, that's nice. Though...I thought styles were explicitly banned?

Anyway, I kinda hope the moves he learns here will come up later as part of his repertoire.

I wonder how strong that teacher is, since she's apparently a top 5 and could see his slash without too much apparent strain.