Elio, a rural count's daughter, gets caught up in her father's scheme to seduce the young duke. Even though not a single fingertip touched him, she overnight becomes a 'trashy young lady' who assaulted the imperial princess's fiancé. However, instead of clearing up the rumor, the young duke fans the flames of the scandal. Wanting to escape her abusive father, Elio accepts his proposal to act as his fake fiancée for three months. Thus begins a fake engagement. The problem is that she keeps getting swayed as if it were real.