结衣（高田忧希 配音）是COLORS的领队，拥有着凝聚人心的气场。虽然平日里是个性格十分胆小的好哭鬼，但一旦被惹怒，便会展现出非常恐怖的一面。小幸（高野麻里佳 配音）的家中经营着一间蔬果店。做事咋咋呼呼的她是身体比头脑先一步行动的类型，常常因此而惹出笑料。琴叶（日冈夏美 配音）是一个沉迷于游戏的宅女。
在无底洞穴中，各种奇妙的生物栖息其中，挑战大洞穴的冒险家逐渐获得了“洞穴人”的称号。
The story of the movie is somewhat based on the plot of the most recent game, "Sakura Wars 3," released back in March this year. While the game features Lieutenant Ohgami, the main character who takes off for Paris, narrates one side of the story, the movie unveils the secrets behind Hanagumi. Ohgami leaves for Paris, consequently leaving Hanagumi without a leader; thus a new character will be introduced here. To be replaced with Lieutenant Ohgami is the former leader of Hoshigumi, Rachette Artile - a rationalistic and distinct individual, who brings about serious problems to Hanagumi. The members are now in discord with Rachette. Meanwhile, Teikoku Kagekidan was being threatened by some irrelevant demons and a new type of anti-kouma mechas, (brought by an american company) appears and tries to replace the koubu-kai. Having made repeated mistakes due to the absence of Ohgami, Hanagumi is now faced with an unprecedented danger, while the abolishment of Teikoku Kagekidan Hanagumi is being schemed.
