Mikuru, a shy noble lady blessed with the mysterious power of "White Protection", which can heal wounds and illnesses, is set to enter an arranged marriage with Alvis, the heir to the prestigious Revant Marquisate. Nervous about meeting her soon-to-be husband, Mikuru travels to the royal capital—only to be met with his cold and distant demeanor. Despite the political nature of their union, Mikuru longs to build a warm and loving home, just like her childhood family. One night, she whispers an old "love charm" over a sleeping Alvis:"Please… let him fall in love with me." It was just a harmless superstition… or so she thought. But the next morning, Alvis begins acting completely different—showering her with affection?! A heartwarming fantasy rom-com between a gentle noble lady and a cool yet romantically clueless future duke, all sparked by a simple "love spell"!