Rose Star Runners: and the Universe Princess

Will was just minding his own business one day at the park, when he meets a little girl who just won't leave him alone. When he finally gets her off his back and goes home, she's there! And what's worse, Ky and Jina are acting as though she's lived there for years. Will nearly drives himself mad trying to crack this riddle, but things quickly change when a powerful dancing army invades Gohanesse looking for her. Now, the boy must decide if he should help her or hand her over to the unknown ...