Bundled with the 5th volume of the Kekkai Sensen: Back 2 Back manga.

Part two of Kengan Ashura Season 2.

Touma Kusaka stands out from the rest of the Choshu Clan, as he does not share their anti-foreigner sentiment. After reuniting with Keiichirou Akizuki, a vassal of the Tokugawa family who once helped him escape from government authorities, the pair begin studying English in secret. As they continue to meet behind their feuding families' backs, romance between the two begins to bloom. But with war looming on the horizon between their respective clans, Kusaka and Akizuki's hope for a world where they can be together may never come to fruition if their obligations and bloodlines get in the way.

In these earlier adventures of Lina Inverse and Naga the Serpent, learn how the two rivals first met. In their first adventure, the two rivals meet and run into a vampire during a rescue mission. Next, Lina is hired to be the bodyguard of a rich man's daughter, Sirene. Lina is at first very enthusiastic about it at first, as she is being paid very well, but Sirene keeps spending all of Lina's first half of pay. (She gets the other half later) She puts together a fake kidnapping to teach Sirene a lesson, but when she really gets kidnapped, she must team up with Naga to save her. In the final episode, Lina and Naga find themselves on seperate sides in a fashion war. (Source: ANN)