The Count's daughter, Serafina, has a fiancé she absolutely hates. It's the Marquis's son, Teddy, who has bullied and made her cry since they were young. "I'll make him hate me with all his might and get this engagement annulled!" Vowing this, Serafina spends her school days as a "Zannen Reijou" (disappointing lady) by disguising her face and figure. However, the Second Prince Leonardo, who took an interest in her, approaches her with a certain deal……!? This Prince is way too demanding...!! A Dekiai Comedy starting from a "secret deal" between a reckless, energetic talented woman and a black-hearted Prince with a nobleman's face!