Save the Sunfish Princess!

Prime Minister Bambietta is stabbed to death by Ruslei, the monarch she raised to become emperor. At the brink of death, she signs a contract with mysterious monsters and regresses 10 years into the past. The condition of the contract is simple: place Nenya, an ordinary girl, on the throne of the Caria Empire. However, if Nenya dies, Bambietta regresses again. Her confident ambition is shattered upon realizing that Nenya is a complete "sunfish"—fragile enough to die as easily as breathing. Within a finite loop, Bambietta must make Nenya emperor by any means necessary to survive. Yet, the story takes an unexpected turn as it devolves into a messy love square triggered by the imperial knights...