A terminally ill girl named Himari Takakura is miraculously saved from death by a strange spirit who resides in a penguin-shaped hat. However, in exchange for extending her life, the spirit tasks Himari's brothers, Kanba and Shōma, to seek out an elusive item known as the Penguin Drum with assistance from a trio of strange penguins.

Legendary rap group The Dirty Dawg could have taken Japan by storm, but then they broke up. Now each member fights in one of the four rival groups. Battles for turf are fought with rap and the Hypnosis Mic, a microphone that can affect the human spirit.

Ryuji Kisaragi is a normal high school boy living a peaceful life, which is turned into an adventure when his second cousin Eriko suddenly returns from overseas. He gets recruited into her organisation, the Seven Tails, in order to help her find artefacts called Lost Precious. Ryuuji and Eriko manage to seize a relic box from a black broker named Fang. Inside the box they find a girl whom Ryuuji names Rose because of the rose like pattern on her left hand. When it turns out that Rose is in fact a Red Dragon, Ryuuji decides to protect her from the black organisation using his powers as a level 10 Breaker.