The manga inspired a drama CD that Shueisha bundled with a limited edition of the seventh volume in October 2014.
The manga centers on a group of four male high school students who are close friends: Natsuki, Tomoya, Keiichi, and Tsuyoshi.
The February issue of Shueisha’s Bessatsu Margaret magazine revealed on Friday that Minami Mizuno’s Nijiiro Days (Rainbow Days) manga is approaching its climax (Note: The word “climax” written in the phonetic katakana alphabet often refers to the final chapter of a manga.).
The manga’s 13th volume also bundled an original anime DVD last September.