The Boxer, Vol. 9 (manga)

Yu has almost conquered the boxing world, and all that’s left is to defeat Aaron Tide and claim the heavyweight belt. But before their long-awaited match, Tide’s sudden retirement throws a wrench in that plan. Despite the setback, K continues to prepare Yu as if the fight will happen. He knows the inner workings of Aaron’s heart —and he’s sure that this isn’t a battle his former pupil can simply run away from. And a surprise visitor to Aaron’s front doorstep could be the push he needs to enter the ring for one last brawl…