Princess Letia, who is known as the "Ice Villain" for her beautiful yet arrogant nature, keeps all men at bay. But she has a secret: she has memories of her past life and an unrivaled love for coffee! However, in this world, coffee is a "gentleman's drink," and it is considered indecent for a noblewoman to drink it. If she were to marry an aristocrat, she would have to give up her beloved coffee. Unwilling to accept this, she has been treating her suitors coldly, but... One day, at a ball hosted by the royal family, someone brings a red fruit - "coffee cherries" - as a gift! He claims to be a marquis from a neighboring country, so Letia thinks he will accept her drinking coffee! So she decides to marry the marquis, Lucas Brasias. Meanwhile, Lucas, who has been asked to marry the princess, wonders why he, a former commoner who was promoted due to his achievements as the commander of the knights, is being offered the role. However, he falls in love at first sight with Letia, who is cute, contrary to the rumors, and who has also recognized the territory's specialty, "coffee cherries"! In order to enjoy coffee... In a different world where he has been reincarnated, this coffee enthusiast will use the knowledge of his previous life to reform his territory!