Iriya's Sky, Summer of the UFOs) is a Japanese sci-fi light novel series written by Mizuhito Akiyama with illustrations by Eeji Komatsu that centers on the relationship between Kana Iriya, a high school girl who has to fight alien invaders, and Naoyuki Asaba, a member of the school newspaper club and one of her few friends.

Later, a six-episode original video animation adaptation was created based on the novels; the DVDs were released in Japan between February 25 and July 29, 2005.

During this private lesson, a group of people show up in search of Kana and take her back to the nearby air force base where she is staying.

Little does Naoyuki know that Kana is in fact an expert fighter pilot engaged in a war between humans and aliens that has been going on since the Kenneth Arnold incident on June 24, 1947.

The light novel series of Iriya no Sora is written by Japanese author Mizuhito Akiyama and illustrated by Eeji Komatsu, also known for his work on Planetarian: The Reverie of a Little Planet.