Edgewalker: My Mentor Is Robocop

David Martinez just wants to finish reading and free his mother from the fate of poverty. But a sudden gang fight pushed him into the abyss. In order to pay for his mother's treatment and his own life, David licked blood at the tip of a knife almost every day. Until one mission, he bumped into the cold mechanical police sergeant His life has completely changed [The plot of the story may be somewhat different from that of Edgewalker, and incorporates some of the worldview of RoboCop]