Extra: We're Still Smiling in the Summer 100 Years Later

Extra: We're Still Smiling in the Summer 100 Years Later (番外: 百年後の夏もあたしたちは笑ってる) is the second spin-off of the light novel Golden Time series. It was released on January 10, 2013.

Chapters

 * Chapter 1: Mitsuo's Room
 * Chapter 2: A Hundred Years After That Summer, We're Still Laughing
 * Chapter 3: Summer Night Tour
 * Postscript