Here are the classical pieces of music Ayu's songs are mashed up with :
01. Voyage [Pachelbel's Canon]
https://www.youtube.com/watch?v=stCKjZniMsQ
02. SEASONS [Dvorak: Homeward Bound (Symphony No. 9『From the New World』~2nd movement)]
https://www.youtube.com/watch?v=m2qCHLx_4qA
03. Days [Vivaldi: Violin Concertos "Four Seasons" - "Winter" ~2nd movement]
https://www.youtube.com/watch?v=Cp52PCIk_1k
04. TO BE [Bach: Well-Tempered Clavier Volume 1 first song Prelude]
https://www.youtube.com/watch?v=OzerJmdStq8
05. YOU [Petzold: Minuet (Minuet of Bach)]
https://www.youtube.com/watch?v=JNpxyjYPVUg
06. Virgin Road [Chopin: raindrop prelude]
https://www.youtube.com/watch?v=6OFHXmiZP38
07. Dearest [Dvorak: Humoresque No. 7]
https://www.youtube.com/watch?v=H3dhH5goUyE
08. HONEY [Handel: oratorio "Messiah" - Hallelujah Chorus]
https://www.youtube.com/watch?v=usfiAsWR4qU
09. winding road [Debussy: Preludes Volume 1 ~ La fille aux cheveux de lin]
https://www.youtube.com/watch?v=ctFJhC-WMXo
10. Who... [Elgar: Salut]
https://www.youtube.com/watch?v=tYrj9jgxC8c
I really disagree with Ayu about the choice of songs.
There are plenty of other songs, love songs, she could have chosen instead of the eternal SEASONS, Voyage, Days, TO BE, YOU, Dearest, Who..., and the worst of all : HONEY.
Please, those new versions better be good.
Oh, and Pachelbel's Canon would deserve a lot better song than Voyage IMO...