In the Netflix series 'The Rat,' Seol Kyung-gu played the role of No Ja, a loan shark, showcasing intense action and bromance. No Ja was once a mid-level boss of a thriving organization but ended up as a loan shark after losing all the money he invested in popular author Jeom Mun-jae. He joins forces with Jeom Mun-jae to uncover the identity of 'The Rat,' leading to unexpected 'bromance.' Seol Kyung-gu described the work as a warning about the rapidly changing times and expressed concerns about the introduction of AI technology. He emphasized the importance of creating a safe environment where actors can perform freely.