It is about teenagers/adults who fought in a dark tournament the night to receive the title “KING” something... The hero is a Japanese boy who uses fire, he wants to defeat his father, the current “KING”, like him he uses fire and is the typical one whose concerns are only about strength, fighting etc. One of the chapter I remembered, the hero fight a german blond guy with the nickname “Fenrir” because he uses electricity and this northern beast is a tale told to the bad children. The manga is a shonen/seinen type, thkans to help me remember the name of this !
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