Colette wa Shinu Koto ni Shita

When exhausted workaholic apothecary Colette jumps into a well, instead of dying she finds herself caring for a new patient: Hades, Lord of the Dead. As Colette goes back and forth between her world and the underworld, new patients of every kind arrive daily!
(Source: VIZ Media)
Note: Chapter count includes 11 extras and a one-shot.