Kanojo wa Ki Boshi Shijou

is a Japanese light novel series written by Yu Ueno, with illustrations by Akaza. The series began publication on October 10, 2005 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"On behalf of humankind, we have signed a friendship treaty with aliens."-The sudden announcement by the President of the United States shook the world. The tribal coalition immigrant fleet-Trion's spacecraft has been investigating humankind on Earth for decades and has been in contact with governments. But for mediocre high school student Nozomi Serizawa, it was supposed to be "big news not directly related." Until the beautiful girl, Silk, who was born between Trion and the Earthlings, came to the Serizawa family ... Hope to collide with silk, which does not know the common sense of the earth and hates to lose. However, while touching the inside of the silk heart ...