Produced with Javier Ambrossi and Javier Calvo (“Veneno,” “La Mesías”), now Cannes Festival main competition contenders as directors of “La Bola Negra,” Movistar Plus+ Original “I Always Sometimes” begins with love at first lust.  Laura (Ana Boga), a festival organizer in Berlin, and Rubén (David Menéndez), a bar owner, meet at music fest Sonar and now walk the night-time streets of Barcelona quoting Rilke. They attend a rave on Montjuich, chill out in a chic bar owned by a friend of Ruben’s, and have great sex, after which Rubén proposes she moves in.    Cut to Ep. 2. Laura got pregnant one week after meeting Rubén, has moved out – he proved a booze-addled wastrel – and is back with her suffocating parents.…