NARUTO: Rai no Sho - Ai wo Itareta Kemono!!

A manga-omake included with the Rai no Sho fanbook. It is set during the events of the Blank Period after the events of The Last: Naruto the Movie. The omake is unique as it is through Akamaru's point of view on his thoughts on master/partner Kiba Inuzuka.
(Source: Naruto Wiki)