Summoned Hero...But I'm Just an MTL'er?!

I should have been at my desk.Lifting my head and seeing a bright white light, the first thing I thought was that I should be sitting in my desk right now. I was reading the latest release of Ryouriban by Konobuta when I became extremely sleepy and put my head down for a quick nap. But now I can feel my back is on a cold, hard floor and I can't see anything but a blinding light."You have been summoned to our world as a Hero. A Hero to help prevent the Eternal Sunset as prophesied by my predecessor. It is impertinent of us but we beseech you..."A voice? Wait....this can't be happening."....please! Please save our world!!!""