"Why don't I ever see you in the ring?" His tongue darted past his lips, leaving a trail of saliva to glisten over his lips. Leaning back on his hands, his eyes trained intensely on me. A wave of heat covered my body, head to toe. I felt naked under his stare. "Because Kuroo, I would rather train and help others than fight myself." My breathing finally stabilized, "so train me." // In which Miya Naoki's dad owns a gym that trains the best fighters in japan, one of them being her brother, Atsumu Miya. After Kuroo lost tragically to his biggest rival, he results in asking Naoki to be his personal trainer to become reborn as a fighter. •boxer au •all characters are aged up •mature content- NSFW.