Sakusei Byoutou ~Seikaku Saiaku no Nurse shika Inai Byouin de Shasei Kanri Seikatsu~ Ch. 3 Kouhen | Life in a Hospital With Only the Worst Nurses! Ch. 3 (COMIC Ananga Ranga Vol. 80)
A story about a mommy instructor of rural martial art who got brainwashed by a monster and transformed into a muscular combatant