Spin-off: 2D-kun Special

Spin-off: 2D-kun Special (外伝 二次元くんスペシャル) is a spin-off volume of the Golden Time light novel series. It was released on June 10, 2012.

Chapters

 * Chapter 1: Mr. Two Dimensions Special
 * Chapter 2: Love from Mr. Two Dimensions
 * Chapter 3: The Nijigen Incident
 * Chapter 4: Farewell, Mr. Two Dimensions
 * Postscript