Watch Astro Mayabang for Free: How to Stream the Movie Online at 123Movies. . Astro is Filipino and he is proud of it. He flaunts it through his clothes, accessories, and collections of CDs, posters, and post cards of the Filipino achievers he idolizes. He comes across Dawn, a Filipino-American girl, who befriends him in hopes of learning more about her Filipino heritage. Astro teaches her the side of the Philippines he knows well and prefers.