Life as a Tower Maid: Locked up with the Prince

Transmigrated into a novel and reincarnated as the maid of a prince who was trapped inside a tower.It was depressing enough to be trapped in a tower, but the situation that I found myself in as soon as I transmigrated was straight up dangerous.The original owner of this body, Rosé, threatened the prince and forced him to kiss her!To make matters worse, Rosé was completely obsessed with the prince, and while trying to monopolize him, she dies a futile death!We're right on track to [death via decapitation] as soon as the prince escapes the tower.So instead, I offered to make a contract with the prince, aptly titled as 'The Contract for the Life and Death of Rosé Artius'.No skinship at all! As long as he guarantees that I'll live until an old age, I will devote my diligence and loyalty to the prince!But somehow... the prince's gaze was a bit dangerous. And inside the tower, we were totally alone."Rosé, let's kiss."...How did it end up like this?!