Summoned in another world to die and reborn

I was having fun on this school trip, except some people were annoying. I thought today everything would go well. Then I saw the most beautiful pair of blue eyes. After that, everything went blank



Where was I? I was in another world, and everyone looked familiar, except it looked ancient.



Defeat the Demon lord, no way? I don't want to die.



We were sacrificed, but why were we summoned then?