The start of Japan's Worst Nightmare.
Sudden explosions rung out from the streets of Tokyo, as the villain, Akira Agarashi zipped through, using his new quirk. One For All. Given to him by Midoriya Izuku to make him a hero. But Akira didn't want wouldn't be a hero, he didn't have to with this power! He thought to himself. He could do whatever he wanted! Nothing could stop him, the cries of the innocent or the begging of the pathetic heroes that tried to stop him.
Tremor, a hero with an earth manipulation ability was among the first to try to stop him, but not even his strength could stand up to the raw speed and power of One For All. He continued to go through heroes as he gathered riches and equipment he liked the look of. Then, finally, he comes across a hero who could stand a chance against him. Lightning Bolt. This hero, fresh out of U.A, had a lightning manipulation ability. His quirk's ability used thunderous weather to work.
His quirk was not only incredibly fast but could output a good amount of damage. This was something Akira would soon find out, as the hero appeared in front of him with a flash, planting a solid right hook into his chest. The speed of the impact would send Akira down into a building and bringing down the rubble down on him. Nothing happens for a second, before some red lightning flickers above the rubble just as Akira uses the strength of One For All to burst out of the rocks. He immediately began searching for the bastard who hit him. Lightning Bolt saved him the trouble by landing down a few feet away from him. "Who are you, Villian!?" The man yelled at Akira. "I am...your Worst Nightmare." Akira chuckled to himself.
"What does that even mean?" LB tries to ask as he spots red sparks flicker near Worst nightmare's feet. It tried to activate his quirk and dodge, but ended up just being grazed by a punch being sent his way. Using his opponent's confusion to his advantage, Akira spun and slammed his foot into the back of LB. The pain on his face was very clear in the split second before he got punted out of the building.
Lightning Bolt activated his quirk in the air to gain control of himself and zapped on top of a rooftop, wiping the blood off his chin. It wasn't long before Worst Nightmare had jumped up to the same top. Taking a deep breath, Lightning Bolt began his assault. He was constantly zipping around Akira, striking him quickly before retreating. The attacks weren't going to do much damage, but they would eventually wear him out if he didn't do anything.
He tanked the next few attacks until he a pattern. Using the pattern, he would predict when LB's feet would be on the ground instead of zipping about, stamping his feet down on the rooftop and causing it to burst. LB would be left in mid-air, confused and probably about to get hit by a rock. Worst Nightmare pulls back his fist and jams it straight into LB's face. Yet again, the hero was undergoing into extreme pain and thrown through a few buildings.
Akira quickly caught up, just in time for LB to have finished recovering and standing up. "What the hell...what kind of quirk do you have?!" He yelled at Akira. Worst Nightmare began to laugh again, much to Lightning's Bolt's dismay. Growling, Lightning Bolt attempted another attack, a straight on punch to the face. The fist got caught and the two skidded backwards from the impact of the attack.
In response, Akira spun and threw the hero straight back into the buildings. Barely alive, Lightning Bolt stood up. Upon taking a look around, he saw no one. Akira had vanished. Then, LB felt an arm grab into his face and another on his shoulder. Then, with a sudden twist, Worst Nightmare snapped his neck. He practically folded and collapsed on the ground. Akira laughed even more with an extremely psychotic look in his eye.
After regaining his composure, he jumped out of the building and continued his horrible rampage. Not a single hero who fought him lasted any longer than Lightning Bolt. If all the bodies created by the rampage were practically piling up together, it would be the size of All Might. Akira began hiding out in a small forest while taking a breather. About 10 minutes after, Akira began seeing things out the corner of his eyes. A shadow quickly darting about, observing him trying it's best not to get spotted. Then, out of nowhere the shadow flew straight at him and yelled. "FULL COWLING!" Izuku Midoriya, previous owner of One For All, had just kicked Akira square in the jaw. Being sent into a tree and sliding down it, Worst Nightmare sat straight up.
"YOU."