After his grandfather vanishes, leaving behind only illustrated martial arts teachings, Neru Isami, also known as Neru, emerges as a skilled fighter in a society that undervalues hand-to-hand combat. Despite his prowess, Neru struggles to find his place and purpose among his peers in junior high. Everything changes when Akebi Haiba, a senior student, introduces him to a prestigious martial arts academy, Amato High School. As Neru navigates rigorous training and gains admiration, he grapples with upholding his grandfather's teachings amidst newfound fame, battling to stay true to himself.