Filmax has picked up international rights to the latest work by sibling filmmakers Carol and Marina Rodríguez Colás, “Bros,” a dramedy about three 15-year-old working-class boys coming of age in the outskirts of Barcelona. “Bros” follows the Rodríguez Colás sisters’ acclaimed 2021 hit, “Girlfriends,” about a woman returning to the neighborhood she grew up in, likewise on the outskirts of Barcelona. Having also grown up in a similar neighborhood near the Catalonian capital, it’s an environment