The song "Touch" by Jus2 (Japanese Version) talks about a deep connection and love between two people. The lyrics mention the feeling of falling for someone and wanting to explore a deep universe with them. It also touches on the idea of being there for each other, even in moments of doubt and insecurity. The chorus repeatedly emphasizes the strong emotional connection between the two people. Ultimately, the song expresses a desire to know the other person fully and to share everything with them.