Isekai kara no Hitotsubu no ~Kono Hime Kishi Change!~

is a Japanese light novel series written by Ikkei Jukkaidou, with illustrations by Kihiro Yuki. The series began publication on May 9, 2015 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
A mysterious pebble that suddenly fell into my world.

The true identity is-the different world itself !? When I touched the fragments of the different world and got the power of "anti-world" that is not in this world, I met with first-class power but refreshing intelligence, and changed unexpectedly.

Heppoko was a beautiful girl from another world, Kaede. Being associated with a maple, I was chasing the owner of a dangerous "anti-world" ... My daily life was an iron wall, and the troubles of others were supposed to be a fire on the opposite bank, but why ...!

A different world battle action where a different world beautiful girl disturbs my daily life!