In the Hot Streets, the Inner Persona Slays the Whole Scene

In the world of the hot streets, Ryosuke Murakami and his older brother Ryoki Murakami depend on each other in a chaotic neighborhood. Their mother died early, and their biological father gambled and ran away. To give Ryosuke food and schooling, Ryoki roamed the streets, covered in wounds, forcing himself to become the crazy and arrogant 'Kyoukai Mad Dog' from the original work. To prevent his brother from doing dangerous jobs, Ryosuke, with top grades and a full scholarship plus living allowance, entered the infamous delinquent den—Kyoukai High School's full-time division. Meanwhile, Ryoki, to protect his younger brother, entered the part-time division and threw himself into the hellish 'Hundred-Man Fist Challenge'. In everyone's eyes, Ryosuke is a bespectacled, gentle, and studious student with a sunny smile. But when he witnesses his beloved brother covered in blood, his sanity snaps—pain suppression, 100% physical instinct, beastly intuition... the dormant violent inner persona tears off its disguise! The refined boy takes off his glasses, his eyes turning into those of a bloodthirsty beast, and with bare hands he brutally tears apart the elite enemies on the field! — Description from novelcodex.org