you were one of the smartest scientist in the world, and that being said, you had to work on difficult projects and problems going on

at the meantime, you were given a responsibility to experiment on a demon and an angel, who seemed to have fallen down the human world. they had their own cage in your office, with the metal being special so it's unbreakable.

it was breaktime, so you left the office. but when you came back, your experiments were out of their cage, seemingly to smirk at you