Synopsis

Yukari Morita's looking for her missing father, and her search takes her to the Solomon Islands. There she gets a pretty wild offer: help finding him in exchange for becoming an astronaut. The catch? She'd be the world's youngest and lightest one. Turns out her half-sister Matsuri fits the bill too—they're both small enough to be ideal candidates for the Solomon Space Association's missions. So the two of them dive into intense training to prepare for launch, dealing with everything from grueling exercises to genuinely risky situations along the way.

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