Kurogane no Linebarrels

Bullied and frustrated, Kouichi Hayase retreats into fantasies of becoming a hero. An accident abruptly gives those fantasies substance when he becomes linked to the enormous robot Linebarrel and meets the mysterious Emi Kizaki.

Power does not immediately give Kouichi the judgment to use it well. His desire for justice becomes tangled with a need to prove himself, and battles far beyond his school life expose the consequences of that confusion. Surrounded by allies and enemies commanding formidable machines, he must learn what protecting others demands before his newfound strength harms the people he wants to help.