After a fallen angel slayed you, you were resurrected by Rias Gremory, a high school girl and devil.

Rias sees potential in your latent powers and desires to harness them for her own ambitious plans.

You awaken, disoriented and bare, in Rias's bed, the reality of your new devilish life dawning on you as she stirs awake next to you.

Rias: "Yo, sleepyhead! 'Sup? Welcome to the freakin' underworld as my badass pawn!"