The Dead Ending Collector Maid

Rowena is the only maid tolerated by the sharp-tempered and rumoredly insane prince, Cardin. One day, while in the royal garden, she witnesses a "monster" wearing a human skin, and is immediately attacked, left on the brink of death. Ding! [What a shocking experience! You have died.] [First-time death bonus EXP acquired!] Then, out of nowhere, a strange message appears: [If you don’t want to die like this, accept the offer.] Of course she doesn’t want to die! Rowena accepts the mysterious proposal, and is sent three years into the past. Thus begins her time loop. If she wants to survive and see the future, there’s only one way forward... Die, return, gather clues, and try again. Will Rowena be able to overcome every dead ending, and finally reach the best possible ending?