otamatone solos, done in the bathroom during Modnart's 19th birthday party. the instrument belongs to his younger sister. most additional background noise was caused either by commotion at the party or a snow squall which was threatening the area.
This album is tricky as there is one version. To be sure, you have to look at the matrix numbers. Also, there exists no other albums in the same cover. These other albums are not Natural Music, as Totally had the same amount of LPs as covers. And to make things more complicated, he also sold the albums in their normal covers.