The song "FL-AI-YER" by Kizuna AI is about dreaming and realizing the potential of the future. The lyrics talk about waking up from a dream and realizing that there is no need for eternity, as well as finding one's own reasons and connecting two destinies. The song emphasizes the power of love and the desire to reach out and connect with others. It also mentions the idea of rewriting the shape of AI and the voices reaching out through the screens. Overall, the song portrays a message of hope and the excitement of facing the unknown future.