Why the hell was I summoned to this part of another world

Colt Pelter, your average high school boy, was living his daily life when one day all of his classmates were transported to another world, he opened his eyes to see some of his classmates with him while others were not.
Colt was surprised to be informed by a so called King, of the impending threat that they were tasked to stop if ever they want to survive together with the inhabitants of this world
"Wait where are our other classmates?"
"Your companions?, all the other kingdoms agreed to divide you evenly, some to the elven territory, some to the land of sands and others to the city of gold" The king answered.
"Ummm may I ask where we are in this world?" a female classmate asked
"Oh that's simple, you're in the military kingdom of Ileria, basically you're at the frontier"
'F*ck, we're going to die', Colt and his two other companions thought.

_I'm a new author and i started this series to experience writing and I would like constructive criticism_

Cover is not mine. Full credit to https://www.reddit.com/r/silverhair/comments/f45onw/underwater_original/