"Kasalanan Ko Ba" is a heartfelt song performed by Toni Gonzaga. The lyrics express the intense emotions and struggle of loving someone who is already in a committed relationship with another person. The song talks about the narrator's feelings for someone and how they cannot help but love them deeply, even though it may be considered wrong. The narrator acknowledges that there might be someone else who loves the person as well, but questions why they had to find love in the narrator's life. The lyrics further explore the narrator's internal conflict, wondering if it is their fault for falling in love with the person. They didn't intentionally choose to love them, and they struggle with their feelings. The narrator questions whether their genuine and faithful love can be stopped or controlled. The song also portrays the narrator's pain and anxiety when they see the person with their partner. They endure the anguish of being in their presence while secretly longing for their love. Despite the difficulties and inner turmoil, the narrator continues to hope and hold on to the desire of waking up beside the person they love, wishing that separation would not occur. Overall, "Kasalanan Ko Ba" is a poignant and introspective song that delves into the complexities of love, guilt, and longing. It explores the dilemmas and struggles faced when loving someone who is already committed to another.