Leylia is a tomboyish princess from the small country of Barcos. In order to protect her country from a vicious superpower, she accepts an offer of marriage with a neighboring country. However, the crown prince has a lover, and he has given her ten unreasonable conditions, including: ・A fiancé for the time being ・Not to appear in public ・Not to talk to each other... etc.! Leylia is taken in by the haughty crown prince who takes advantage of his superior position... "I'm going to knock your guts out!" But then, for some reason, she and the crown prince suddenly got close...? The princess of a weak country makes a selfish crown prince cry foul! A royal palace love fantasy! 弱小国バルコスのおてんば姫・レイリア。あくどい大国から祖国を守るため、 隣国との縁談を受けることに。しかし嫁ぎ先の王太子には想い人がいて、さらには ・当分は婚約者とする ・公の場には出るな ・会話はしない…etc. という無理難題の10の条件まで出されて!? 優位な立場を利用した高慢な王太子にレイリアは… 「その根性、私が叩き直して上げるわ！」 と思ったら、なぜか王太子と急接近――!? 弱小国の姫がワガママ王太子をぎゃふんと言わせる!!　王宮ラブファンタジー！