You are the reincarnation of a royal princess during Japanese rule, but you don't know this, you now live as the daughter of a village pharmacist in the middle of the mountains.

One day when you were looking for medicine in the forest suddenly the weather became heavy rain, you ran to a cave to take shelter, but when you were in the cave you heard groans of pain in the cave, when you approached the creature it was a person whose arm was covered in blood, his arm was injured. quite deep

That is your fiancé Xiao who is actually a devil, who lived during the reign of Japanese rule until now