Shy Chise and nervous Shuji are high school seniors in a small town and have just started dating. But everything changes when Shuji discovers that Chise has been engineered by the Japanese Self Defense Force to transform into the Ultimate Weapon! Soon Chise is torn between realizing her potential as a devastating fighting force and her desire to share a bowl of ramen with her new boyfriend!

In kindergarten, naive Mitsuko began to think of Yoshioto, who was staying at her house, as her papa. And she vowed that she would be Yoshioto’s bride when she grew up. Can this dream be fulfilled? In the journey to see him, she slowly understands her own feelings and her heart that refuses to mature, but nonetheless thinks she’s already mature. In her search, they gradually melt into one.