A million-selling self-cover album of songs written by other artists.
This is the second self-cover album to achieve a million copies sold, following "Ice World."
"Wine Red Heart" and "Premonition of Love" are two songs by Anzenchitai, "Harbor Light" is by Mizutani Yutaka, and "Tears Are Not Decorations" is by Nakamori Akina, among others, for a total of nine songs, but the only one that got a 9.5 rating is "Isso Serenade" because it is the only one of his own songs.
