If you get isomnia, you should listen to them. You will feel relaxed. They're beautiful melodies. I usually listen to them before going to sleep. I like Hana no Mau Machi & Mouse Peace best! :)
Track list:
1. Sodachi Jima
2. Ai no Hana (chorus)
3.Hana no Mau Machi (ver.1)
4. Hana no Mau Machi (ver.2)
5. Lost
6. Love in snow
7. Haruka Mirai E「Mouse Peace」
8. Kakigoori (ver.1)
9. Kakigoori (ver.2)
10. Pieces
Download here