From Old Country Bumpkin to Master Swordsman

Middle-aged Beryl Gardenant has only ever accomplished one thing: running a humble sword-fighting dojo in the quiet countryside. But when hes paid a visit by his former pupil, Allucia, he discovers that she has become an elite commanderand shes hardly the only ex-student whos a renowned warrior! Now forced by Allucia to become a special instructor to the strongest order of knights in the kingdom, can Beryl reach his full potential even though hes an old man?

From Rural Instructor to Sword Saint; From Old Country Bumpkin to Master Swordsman (Webtoon Version); 片田舎のおっさん、剣聖になる ～ただの田舎の剣術師範だったのに、大成した弟子たちが俺を放ってくれない件～(タテヨミフルカラー版); The Countryside Old Man Becomes a Sword Saint ~Although I Was Just a Rural Swordsmanship Instructor, My Successful Disciples Won’t Leave Me Alone~ (Vertical Full Color Edition); Katainaka no Ossan, Kensei ni Naru ~Tada no Inaka no Kenjutsu Shihan Datta no ni, Taisei shita Deshi-tachi ga Ore wo Hottekurenai ken~ (Tate Yomi Full Color Ban)