Turn ∀ Gundam: Tsuki ni Mayu - Chi ni wa Kajitsu

A group from the moon, known as the Moonrace, has spent over two millennia waiting to return to Earth. Their mission begins under the leadership of the Dianna Counter. Loran Cehack, who arrived on Earth two years prior, participates in a coming-of-age ceremony. During that night, he comes across the Turn A Gundam.