Jet Racing's wet-n-wild combo of PWC racing and watergun sharpshooting has become mega-popular across the world. Rin Namiki wants in on the action, and after meeting the cool and gorgeous Misa Aoi, it looks like Rin's dreams are finally in reach!

A story about three sisters struggling to survive in a desolate world surrounded by decaying buildings and red fog. The story revolves around Rin, a girl with an updo. There's also Ritsu, the big sister who has cat ears and is always calm, and Rina, the innocent, cheerful one dressed in a maid's costume. Just what is it that these sisters are after in this mysterious world?

The story follows a group of samurai attempting to defend Japan from the first Mongol invasion in 1274.

En l'an 1274, les Mongols ont des vues sur le Japon qu'ils s'apprêtent à envahir. Jinzaburō Kuchii est un samouraï exilé sur l'île de Tsushima. Il se retrouve seul face face aux premiers navires mongols qui annoncent l'invasion prochaine du pays.