The song "River" by UMI explores the aftermath of a failed relationship and the emotional journey of the narrator. The lyrics suggest that the relationship has come to an end, leaving the narrator with broken pieces and a sense of being lost. They feel like they are swimming in the waters of their emotions, trying to find a way back home to themselves. The narrator reflects on their belief that the relationship was stronger and they had hoped for a better outcome. They experience regret for not knowing the other person better and getting caught up in their issues. They also find themselves blaming themselves for the situation, feeling like they have no one left to turn to. Despite the pain and turmoil, the narrator still finds it hard to see the other person happy because they struggle with being alone. They acknowledge that they are different people but question why they were let go. Overall, "River" is a introspective and emotional song about the aftermath of a failed relationship, examining themes of regret, self-blame, and the struggle to find oneself again.