Visual kei band, Blu-BiLLioN brings a single including the main theme song of a live-action drama based on the game "Hakuoki SSL - sweet school life -" and outro theme of the film "Messiah - Shinku no Sho - ." Comes with a bonus DVD featuring a music video of "Kokorobi" and footage related to "Resonance - Kyomei -" and "Monochrome no Hana." Also includes an another cover randomly selected from 12 kinds.