Two OVA episodes featuring additional stories. Episode 0: Ritsu and Takano used to date back in high school, but broke up due to a misunderstanding. This is that story. Episode 12.5: Hatori and Chiaki go to visit the latter's family. It's really awkward in many, many ways.

After his confrontation in the Nether with his younger brother Shou, Shinra Kusakabe's resolve to become a hero that saves lives from the flame terror strengthens. Finding a way to turn the Infernals back into people, unraveling the mystery of the Evangelist and Adolla Burst, and saving his mother and Shou—these are the goals Shinra has in mind. However, he has come to realize that attaining these goals will not be easy, especially with the imminent danger the Evangelist poses. The Evangelist's plan is clear: to gather the eight pillars—the individuals who possess Adolla Burst—and sacrifice them to recreate the Great Cataclysm from 250 years ago. Having been revealed by the First Pillar that the birth of a new pillar is approaching, Shinra is determined to protect his fellow pillars from the Evangelist. Thus, the fiery battle between the Special Fire Force and the Evangelist ignites. Together with the Special Fire Force, Shinra's fight continues as he uncovers the truth about the Great Cataclysm and the nature of Adolla Bursts, as well as the mysteries behind human combustion. [Written by MAL Rewrite]

Returning home to Konohagakure, the young ninja celebrate defeating a group of supposed Akatsuki members. Naruto Uzumaki and Sakura Haruno, however, feel differently. Naruto is jealous of his comrades' congratulatory families, wishing for the presence of his own parents. Sakura, on the other hand, is angry at her embarrassing parents, and wishes for no parents at all. The two clash over their opposing ideals, but are faced with a more pressing matter when the masked Madara Uchiha suddenly appears and transports them to an alternate world. In this world, Sakura's parents are considered heroes—for they gave their lives to protect Konohagakure from the Nine-Tailed Fox attack 10 years ago. Consequently, Naruto's parents, Minato Namikaze and Kushina Uzumaki, are alive and well. Unable to return home or find the masked Madara, Naruto and Sakura stay in this new world and enjoy the changes they have always longed for. All seems well for the two ninja, until an unexpected threat emerges that pushes Naruto and Sakura to not only fight for the Konohagakure of the alternate world, but also to find a way back to their own. [Written by MAL Rewrite]

Japari Park is an untamed paradise where many humanoid animals, known as "Friends," live their everyday lives in all corners of the natural environmental park. One lazy afternoon in the savannah area, the energetic Serval encounters a peculiar new Friend. Curious, she swiftly takes down the Friend, named Kaban, to try and discover what species she is. To Serval's disappointment, not even Kaban herself knows the answer. The two become friends and set out on a grand adventure through the many habitats, landmarks, and attractions of Japari Park. Their destination is the park library, where they hope to shed some light on Kaban’s identity. Along the way, they meet many other Friends, looking into their lives and helping them out. However, they soon begin to uncover the sinister reality behind the park and their own existence. [Written by MAL Rewrite]