6 parts Ongoing Stars exited way before the actual civilization of humans evolved. They were named after actual stars on the sky, that later formed a weird shape, which soon became something we call nowdays "humans".
Stars are powerful. Many people also call them gods, but overall, it's the same whichever way you call it.
Yamato is no exception. He's a Star, a starborn, who's purpose is to go back in time to avoid an ongoing war caused by the seventh Star. He gets sent back in time a few years to get prepared, alongside with his new 'friend'. Though, there's one tiny problem...
Aiko, an energetic and uplifted but fast thinking woman, unafraid to fight in heels and shiny dresses. Chisakii, a put-together, serious but easygoing man, with a sharp mind. Those two are sent from the Stars to find out about Yamatos whereabouts and what happened to him, and why isn't he back yet after a year.
The time is short, they have a few months to complete their goal together with Yamato. Will it work? Will someone get in the way? If yes, can they stop them before it's too late?
The world is depended on them.