Help find anime

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Hello, my friend gave me this description of an anime that sounds familiar and I cannot find. Would be nice if I got help from some people, thanks.

>a kid was born into a military family and he was birthed to become a soldier/fighter for the army and he trains his whole life for that sole purpose but nobody knows about his life except for his family and a girl he grew up with the same lifestyle as him. he and this girl attend a regular school where people see them as regular students but later before high school the boy gets into some bad things such as underground fighting and eventually it catches up with his childhood friend and his family