In his youth, Ryuuhei Oda witnesses his brother's tragic demise, marked by a mysterious symbol. Now a second-year high schooler, Ryuuhei's passion lies in kickboxing. A chance encounter with a strange creature leads to surreal dreams and a subsequent real-world attack. Saved by Jessica Clayborn and Aruto Fushibe, Ryuuhei learns he's enlisted as a 'knocker-up' to battle dream realm monsters. Armed with his kickboxing prowess, Ryuuhei embraces his newfound abilities to protect the city, only to confront a haunting symbol from his past.