 In an interview with Oricon , LiSA explained her experiences with " Träumerei " , where she stated that because Day Break Illusion is an original anime , she wanted the song to be presented in the color of her own work , but even in the world of anime , her music would continue to have an atmosphere of rock , as opposed to the pop style she used in " Best Day , Best Way " . She mentioned that she sang that song in a way that she felt the conflicts that were present in the story and with the strength that was part of the show 's theme . With regards to the song 's music video , she wanted to have a video which would express in color emotions , such as the use of red to represent confrontations , black to represent the feeling of being lost , and green for frightening things . 
