Ninkuu: Knife no Bohyou

Four years have passed since the end of war between the Ninku and the Imperial Army. The remaining Ninku, Fuusuke, Touji, and Aichou, head to Amahara Village to deliver a knife to a girl named Makoto, who is the sister of their fallen comrade Eiji, as a memento. Once they arrive, the town is seemingly abandoned, and the remaining residents are hiding in fear. Eventually, they enter a restaurant and find Makoto (dressed as a boy) and her friend Taikichi. The two explain to the Ninku that the village has been overtaken by the Rasenryu pirates, who have been wreaking havoc, pillaging, and abducting the locals as prisoners. It's up to the Ninku to fight off the Rasenryu in order to restore peace back to Amahara Village.