The Apothecary Diaries, S.1, Ep.31 - The Shrine of Choosing (Patreon)

As I was watching this episode, my mind did go to the concept of what would happen if any of these characters were color blind...

...then BAM! The path was supposed to be decided by someone who shares that trait within the family. It's such a clever puzzle!

Also, poor Jinshi. He doesn't want to hide is secret any longer. Maomao is wanting to catch on, but at the same time she knows better than to pry.