Main character must be a male siren

Must have mastery over his powers (must either chose Borderlands 2 skill tree or a brand new one)

Must be transported to the DxD universe via vault explosion

Must join a peerage but keeps his siren powers at full mastery

Only one female relationship

Mustn't have an emotional background that will make everyone cry like a bitch

Isn't fazed about killing anyone

No guns allowed