Colette wa Shinu Koto ni Shitaコレットは死ぬことにした (Japanese); Colette Decides to Die (English); Колетта решает умереть (Russian); 选择死亡的柯莱特 (Chinese)

From Phoenix Serenade Scans: Meet Colette, a young doctor. Since she's the only doctor in town, she has to attend to everything, and quite honestly, she thinks she needs a break. One day, she's so frazzled that she jumps into a well. But, she didn't die? Instead, she finds herself in the underworld, where she encounters Lord Hades. Somehow or the other, she becomes Hades' doctor. Follow Colette in her new (though still busy) life, now with Hades thrown into the picture!