[Machine Translation] Yuko Ando has been releasing "Adult Serious Cover Series" irregularly for seven years since 2004, mainly as couplings for singles. The songs and arrangements are always surprising, and have been as much talked about as the title track of the singles. The album includes 7 songs that have already been released and 4 newly recorded songs, for a total of 11 songs. The booklet includes illustrations of the songs (not all of them) handwritten by the artist herself.