My Unique Isekai Girl at the Academy

What if your fiancé cheats? Definitely don’t drown your grief in champagne and don’t accept dubious invitations from charming beauties! Otherwise, in the morning you’ll wake up in bed with a stranger. The academy rector? A dragon? He insists that his magical power was stolen and can be restored only by a kiss?! And what does that have to do with me? In my world I’m an ordinary student—yet in the magical world I’m a unique summoned heroine! No, I’m not saving the world… What secret assignment from the king? Are you kidding?!