"Orange" is an adaptation of the free It is also the hottest Japanese youth movie since its release in Japan, with box office exceeding 3 billion yen; the tagline of the work reads: A heartbreaking and dazzling youthful science fiction love story.

"Orange" was first released in It was first published in the supplement "Margaret" of Jiyosha until November 2012, and then transferred to the magazine "Monthly Action" of Shuppan Bunka Sha, where it won the 5th place in the "National Bookstore Staff Vote Recommended Manga 2015" and the 6th place in the "National Bookstore Staff Vote Recommended Manga 2016". The manga has received good results such as the 5th place in the "National Bookstore Choice Recommended Manga 2015" and the 6th place in the "National Bookstore Choice Recommended Manga 2016" and the 15th place in the "This Manga is Awesome! 2015" female section.

The story of the manga takes place in Matsumoto City, Nagano Prefecture, in the spring of the second year of high school, the main character Nahoko received a letter from herself 10 years later. The letter to the future will happen to tell Nahoko, in order to let Nahoko do not like himself to make "regret things", the letter to guide Nahoko should take what action. And 10 years later, the last thing that Nahoko regrets is that she was not able to save Sho, whom she liked in her second year of high school.