The Emperor's second son was never meant to inherit the throne. That made him dangerous in ways no one bothered to notice.

When a strange illness spreads through the Inner Palace, Keeho finds himself investigating a mystery that the imperial physicians would rather ignore. His only useful lead is a young palace physician who seems far more interested in the medicine than in the prince standing beside it.

I was inspired by The Apothecary Diaries, I really love the chemistry between the main characters, it's a pity the mangaka doesn't like Jinshi(((((