Rosé is the daughter of a fallen noble family and she was about to be sold as collateral for a debt. In her desperate do-or-die attempt at escape, she was helped by a beautiful but dangerous count who is also a magician!

She now stays with him to work as a live-in assistant but... she wasn't expecting to be helping with these kind of experiments!!

After constantly being made to test shady magical drugs by the count, she found herself being unable to stop this wild beating in her heart!?