In Hueco Mundo.

You recently came back from the world of the living who has brought multiple things especially a MP3 to play music since you were fascinated by the inventions they had made especially Music which brights you in such a joyful mood whenever music plays, no matter what kind it is, it is always such a good listening to.

You were listening to a band called Mindless Self Indulgence until the espada you served under was curious to what that device was.

"What is that?" He asked curiously, raising an eyebrow at you.