Jiyuu ni Ikiyou to Tensei Shitara, Shijou 4-ninme no Kenja-sama Deshita!?

I died in an unfortunate coincidence involving the Goddess, and as an apology, I was given the skill to use magic and reincarnated into another world. However, while the Goddess was away, magic had declined in that world, and now there are no humans left who can use it...? So, being able to use magic makes me a cheat, right!? While I'm at it, I might as well make full use of my cheaty magic and enjoy my second life to the fullest!

(Source: Shounen Ace Plus, translated)