逆殺起源, Origin of the Counter-Slaughter, 역살기원, El origen de la matanza inversa, Nghịch Sát Khởi Nguyên: Nguồn Gốc Cuộc Thảm Sát Ngược

In modern-day Japan, while brutal crimes occasionally dominate the news, Rakki, a high school student, is rescued by a delinquent just as he is being targeted by a quick-tempered group in his class. Right then, an "outrageous incident" occurs, and strange, unidentified men appear...!? The royal road dark supernatural ability battle serialized in "Afternoon" officially begins!