D_Cide Traumerei the Animation

As a child, Ryuuhei Oda saw his kind older brother die, leaving behind a strange mark near his body. Now a spirited and reckless high school sophomore, he spends his days training in kickboxing, his greatest passion. One evening, a bizarre creature bites Ryuuhei’s leg, sending him into a dream filled with unsettling beings. The next day, those same creatures attack him in the real world-until Jessica Clayborn and Aruto Fushibe intervene, insisting Ryuuhei is their newest member. Under pressure from the looming danger, Jessica tells a bewildered Ryuuhei to become a "knocker-up," someone who can fight the monsters invading from the dream world. Drawing on his kickboxing skills, Ryuuhei unlocks his powers to protect the city-only to encounter that same haunting mark from his past.