'It's easy to romanticise toxicity' says star of film about step-siblings' relationship

'It's easy to romanticise toxicity' says star of film about step-siblings' romance 7 hours ago Share Save Add as preferred on Google Yasmin Rufo Amazon Matthew Broome and Asha Banks play romantically involved step-siblings Nick and Noah in Your Fault: London Scroll through TikTok for long enough and you'll find short films about fictional relationships, with painstaking fan edits, imagined future storylines, AI-generated posters and millions of comments debating them as if they're real. This level of fandom has transformed young adult romance, often found in novels, into one of streaming's safest bets. With #BookTok attracting around 80 million posts on TikTok and #romancebooks more than 6.5 million, platforms are now investing heavily in bestselling novels with passionate online audiences - before a single scene is filmed. The latest entry into that booming genre is Your Fault: London. A film based on the bestselling novels by Spanish author Mercedes Ron, it stars Asha Banks and Matthew Broome, who say they have been struck by the intensity of the franchise's existing fanbase. Getty Images Spanish writer Mercedes Ron, 33, is behind the Culpables Saga novels - a trilogy called My Fault, Your Fault and Our Fault "The fans are the reason the films are so successful," Banks tells the BBC. "The visibility of it and where it lives is so much on social media." This film is the latest chapter in an unlikely success story that began not in Hollywood, but on the reading platform Wattpad, where the Argentine-born Spanish writer Ron first published the Culpables trilogy. The books - called Culpa Mia, Culpa Tuya and Culpa Nuestra were all written before she was aged 20 , and after launching on Wattpad, they went on to became bestsellers, and hugely popular with teenagers. They were then adapted into a hugely successful series of Spanish-language films, simply titled Your Fault. The English-language version of the story - Your Fault: London, story follows Noah, who moves to the capital city after her mother marries a wealthy businessman. Noah falls for the businessman's son, Nick. The step-siblings' romance is tested by family tensions, buried secrets and their own impulsive decisions. Nicole Clemens, head of UK and international originals at Amazon MGM Studios, says the Culpables films have collectively reached 100 million viewers worldwide . The films were number one in more than 170 countries at launch, with over 90% of viewers coming from outside Spain, Amazon said in February. Amazon Nick and Noah's romantic journey is explored in the film Your Fault: London, follows on from 2025's My Fault: London, and will also be followed by Our Fault: London . The middle film picks up as Noah starts Oxford University and Nick focuses on his career, with new relationships and old conflicts threatening to pull them apart. Banks promises "a lot of drama", while Broome says audiences will constantly be torn between the pair. "You'll be agreeing with one character and the