Nabari no Ou (2008)

Amidst the hidden conflicts of society, competing ninja clans vie for an ancient technique that possesses immense power. Unbeknownst to him, the indifferent Miharu harbors this coveted ability within himself. His life takes a dramatic turn as the clans' fierce rivalry erupts around him, forcing him to confront his unexpected destiny. As he grapples with the weight of this newfound significance, Miharu must decide whether to embrace his potential or remain a reluctant participant in the escalating conflict.