In short, 'Kaikan Phrase' is about a band 'Lucifer' that strives to get famous. 'Kaikan Phrase' starts with Santa and Yuki quitting their old band and starting a new one.That isn't so easy if you want to make a wonderful band. In this anime there are beautiful drawings, Lucifer's songs are great, Sakuya's voice is outstanding. Every member of 'Lucifer' has their own unique character, especially that mysterious Sakuya Ookouchi, but even he who seemed a very cold guy at the beginning, is able to fall in love.