Who cares about an Isekai? Surely not me!

All that Ran wanted was a nap, just a tiny nap. How comes when she wakes up, she has to become a hero in an Isekai adventure to defeat the Demon Race?

"Chosen One, you are now a Hero who will fight alongside others against the tyranny of the Demon King and free the Human race," announced the monotone voice.
"Seriously, Brain? A summoning in an Isekai? Talk about originality," she complained to herself.

"Only you can fight the Demon army and free us all," the voice was like a broken vinyl.
"I don't care!" she yelled with force.