Edens Zero

Shiki lives at Granbell Kingdom, an abandoned amusement park where he's the only human. Rebecca and her cat companion Happy arrive at the park's entrance, marking the first human contact in a century. Shiki forms friendships with Rebecca and Happy, but his former neighbors exploit the situation to spark a robo-rebellion. As the park becomes increasingly unstable, Shiki joins Rebecca and Happy on their spaceship to escape and explore the galaxy.