At the age of 12, Serena Ashenheid attended the fiancée selection party for the crown prince. She was once known as the "rare evil woman" and was accused of an innocent crime against the crown prince and his sister-in-law. I remember that he died in prison at the age of 18 after being forced to wear this. She said, “That's dangerous, I have to avoid getting engaged to the crown prince at all costs!'' Serena immediately proposes marriage to the beastman knight Glenn Bryant, who was present at the scene, and successfully avoids her engagement to the crown prince. However, Glenn, who at first did not accept the nonsense of a child, now offers to accept Serena's marriage…!?A pure love comedy begins with a lie between the villainess and the beastman knight! 12歳になり王太子の婚約者選定パーティーに参加したセレナ・アーシェンハイドは、自身がかつては“稀代の悪女”と呼ばれた王太子の婚約者で、王太子と義妹に無実の罪を着せられた末、18歳で獄中死したことを思い出す。「ヤバい！　王太子との婚約は絶対に避けなきゃ！」とっさにその場にいた獣人の騎士グレン・ブライアントに求婚し、無事に王太子との婚約を回避したセレナ。ところが、セレナを助けるために、嘘に付き合ってくれたはずのグレンが段々本気になってきて――!?