The song "Casual" by Eric Bellinger tells the story of a relationship that started as a casual fling with no strings attached. The narrator and the girl agreed to keep their relationship casual and enjoy each other's company without any serious commitment. They would meet up after the club and have a good time together. However, as time goes on, the girl starts developing deeper feelings for the narrator. She begins to worry about things that are not relevant to their casual relationship, such as shopping for engagement rings and getting overly jealous when the narrator goes out without her. The narrator is confused and doesn't understand how their relationship changed so dramatically. He remembers the days when they had great chemistry and wonders why things had to change. He questions the girl's behavior and expresses his confusion over her sudden anger towards him. The song portrays a sense of disappointment and frustration as the casual relationship turns into something more complicated. The narrator reflects on the initial agreement they had and laments the fact that things couldn't remain as carefree as they used to be. Overall, "Casual" explores the complexities and challenges that can arise when a casual relationship starts to evolve into something more serious. It highlights the disconnect between the initial agreement and the emotional attachment that develops over time, leaving both parties confused about their changing dynamics.