Taming My Dragon Family

Leo Lee travels to a Beast Taming world, suffers a failed Contract, and is betrayed by his girlfriend. He binds with a pay-to-win System and encounters his cousin, the Black Dragon. He tames SSS-Rank dragon relatives, using the System and dragons' power to put enemies in their place, destroy The Shaw Family, and quell a beast tide. His counterattack from a good-for-nothing to a God-Tier Beast Tamer.