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.
公爵的女儿Katarina Kulleyes回忆起她过去的生活，当时她的头被石头击中。这是一个她沉迷于“财富爱情”游戏的世界，她是阻碍主角浪漫的反派小姐！游戏中为卡塔琳娜准备的结局，无论她是否流亡国外。。。或者被杀。。。
销量超过70万册的爱情故事《我的樱花情人》终于被改编成电影版了！摄影学徒清人爱上了美坂，但美坂患有不治之症，衰老速度是普通人的几十倍。这种稍纵即逝、弥足珍贵的爱情，就像樱花盛开的季节，花瓣飘落在地上。美坂关二的美丽瞬间被晴人用相机一一捕捉到。
