After Gravion was able to use its ultimate attack, the Zeravire threat seemed to have temporary stopped. However when it rises back up all of a sudden, the Earth Gult and its trump card, the super robot Gravion, is needed to defend this world again. All this while, the EFA is planning to create their own weapons to counter the Zeravire, the Grand Trooper. Now as they attempt to fend off the Zeravire, the people of the Earth Gult and EFA must protect their future as well as confront their pasts, and unveil the mysteries of the Zeravire.

Fresh from being transferred to the LAPD, Miyuki and Natsumi must investigate some unusual car theft incidents in their area. And when Miyuki's yellow 1973 Ford Mustang Mach 1 is "gone in 60 seconds" (literally), the situation gets more complicated when they discover who the thief is. (Source: ANN)

Special, unaired, episodes released with the Senran Kagura BD/DVDs.

​Like many in her class, Koyuki Honda looks forward to her graduation ceremony. However, while her peers have family to attend, Koyuki has no one, as her only family—her brother—died years ago. While visiting his grave, she meets two brothers named Kiri and Victor Putin chasing a strange creature. They try to assure her that they are just actors shooting a movie; Victor, however, piques Koyuki's curiosity about the old legend of the clock tower at the cemetery: if you make a wish under the clock tower at midnight during a full moon, time will turn back, allowing someone to reclaim what they have lost. Deciding to make her wish, Koyuki learns the horrifying truth: the legend is a ruse for time demons called "Horologues" to steal humans' time. As they are drawn to regrets, Victor uses Koyuki as bait to lure a demon there. Kiri and Victor explain that they are Chronos Rulers, warriors who fight against the Horologues using the "Oath of Time"—an item allowing them to speed up or slow down time. With the demon destroyed and the crisis averted, Koyuki is able to go on her way free from regrets. However, she is not the only human with sorrows. The two boys must continue to hunt down Horologues in order to keep humanity safe. [Written by MAL Rewrite]