A fifth manga, titled Robotics;Notes Side Junna: Chiisana Natsu no Monogatari and illustrated by artist NB, began serialization in the November 2012 issue of Kadokawa Shoten's Shōnen Ace magazine. The first volume of Side Junna was released on November 26, 2012, and a second one, on April 25, 2013.
Robotics;Notes Side Junna: Chiisana Natsu no Monogatari