Drug Store in Another World: The Slow Life of a Cheat Pharmacist (2021)

S1E10 Power Potion / RK Gene Fluid

Vivi approaches Reiji with a request for a potion to enhance her strength, but he advises her against relying on such remedies. Instead, they enlist the help of Captain Annabelle from the Red Cat Brigade for some training. Noela and Mina also participate, but unexpectedly, Reiji finds himself pulled into the training as well, facing a grueling routine of jogging and strength exercises. Overwhelmed and fatigued, he vows to concoct a muscle-growth potion out of sheer desperation.