Ato wa Gojiyuu ni Douzo! Tutorial de Kamisama ga Last Boss Taoshichatta node, Watashi wa Suki Houdai Ikiteiku

Synopsis:

I go by the name Karina—or at least that's how it is presently! Previously, I was just an ordinary, unremarkable Japanese salaryman until I was transported to a celestial realm where the Goddess of Time and Space informed me that I would be embarking on a fresh life in a different world—oh, and I would be a girl, since she seems to favor that arrangement. Initially, she wants me to defeat a final adversary whom she holds a grudge against, and then she seizes control of my body to demonstrate how to utilize my newfound spatial magic abilities in a tutorial battle. . . Hold on, isn't that the final enemy I am meant to conquer? ! Within less than a minute of the tutorial, he is defeated! ? And now she claims that the world is mine to explore. Really! ?