raws https://rawkuma.com/manga/katainaka-no-ossan-kensei-ni-naru-tada-no-inaka-no-kenjutsu-shihan-datta-no-ni-taisei-shita-deshi-tachi-ga-ore-wo-hottekurenai-ken/ chapter 29
An Old Man From the Countryside Becomes a Swords Saint: I Was Just a Rural Sword Teacher, but My Successful Students Won't Leave Me Alone!