Last Note.'s second work featuring both Miku and Luka and their fifth published song overall. This song is about Miku and Luka being both rivals and companions; although they fight, they don't lie to each other. One day, Miku dies, or is unable to continue on for an unspecified reason, leaving Luka behind. Remembering the times they spent with each other, Luka promised that she would never forget her, saying that she was the best rival she had ever had. This song is featured in the games -Project DIVA- F 2nd and -Project DIVA- Arcade Future Tone.