lyrics & music by kazma tamaki vocal & chorus by kazma tamaki feat. 那智琉 http://okmusic.jp/#!/works/38890?n=Bitter%20Sweet%20Devil 本家さま http://okmusic.jp/#!/works/44627?n=Bitter%20Sweet%20Devil%20%E3%80%80 feat. 那智琉
http://www.nicovideo.jp/watch/nm24468761