The battle had been brewing for weeks, as rumors spread of a fierce showdown between two powerful opponents. Oliver had been known to be a formidable opponent in the fighting arena, despite his bashful nature and romantic tendencies. Yukari Yakumo, on the other hand, was feared for her ability to manipulate boundaries. As they stepped onto the battlefield, tension hung in the air. Oliver glanced nervously at Yukari, trying to hide his obvious infatuation with her. "W-why are we fighting, Yukari-san?" he stuttered. Yukari gave him a small smirk. "You really are oblivious, aren't you? We're fighting to the death, Oliver-kun. Finally, I can test my boundary manipulation against the universe's luckiest man." Oliver's face flushed with embarrassment as he realized the gravity of the situation. He took a deep breath, trying to channel his powers. Suddenly, the world seemed to bend to his will, as a gust of wind caused Yukari's hair to whip around her face. Yukari merely chuckled. "Impressive, Oliver-kun. But let's see how you handle my boundaries." In an instant, Yukari disappeared into thin air, reappearing behind Oliver with a fierce kick. His reflexes kicked in, and he managed to dodge just in time. But before he could counterattack, she vanished again, reappearing on the other side of the arena with a wave of her hand. Oliver's romantic tendencies kicked in, as he felt his heart rate quicken. "You're so beautiful, Yukari-san. I can't bear to hurt you!" Yukari rolled her eyes, summoning a powerful shikigami to protect her as she prepared to launch another attack. "Don't underestimate me, Oliver-kun. My boundaries can crush even the strongest opponents." As she charged forward, Oliver closed his eyes, trying to focus his powers. Suddenly, a flock of birds flew towards him, narrowly dodging his body as they formed a shield around him. Yukari smirked. "You're just lucky, Oliver-kun. But luck can only go so far in battle." With a fierce battle cry, she summoned a portal, unleashing a running train directly towards Oliver. He gasped, trying to find a way out of the attack. Suddenly, a stroke of luck hit him, as the ground beneath him gave way, causing the train to veer off course and crash into the wall. Oliver opened his eyes, realizing the full extent of his powers. Yukari looked at him with newfound respect. "You're stronger than I thought, Oliver-kun. But let's see how long you can keep up against me." And so the battle raged on, two powerful opponents fighting to the death. In the end, only one would emerge victorious.