(Y/N) is a cold-blooded assassin known only by the pseudonym 'Burgundy'. When the Japanese NPA offers her a deal - track down the elusive killer known as Kira in exchange for her freedom - she takes the job without hesitation. But her mission takes an unexpected turn when a brilliant, volatile mafia leader named Mello steps into her path. (Y/N) soon discovers that beneath his cocky, short-tempered facade lies a broken soul - a boy far more drawn to her than he dares to admit. Will she be able to save him from his demons before it's too late? Not your typical Mello fan fic so beware. TW: mention of depression, suicidal thoughts, swearing, abuse, sexual content