OMAKE 1
Hanyuu's ability to reset time actually had a side effect. Whenever Rika dies, Hanyuu resets time in order to prevent it. These resets have given birth to parallel worlds with similar histories yet different outcomes. In each world, different scenarios play out but the always constant, up until the final reset, was Rika's death.
What if during one of those resets someone from a 'good end' Hinamizawa came to their rescue?
When Shinichi woke up found himself in the forest, at night, he knew something was definitely wrong. He got to his feet and looked around. That was when he heard the commotion. Keeping himself silent and hidden, he spied the situation and his eyes widened.
'Keiichi? Shion? Mion? Rena? Satoko? Rika?' he wondered mentally. 'What are they doing out here?' He looked across from where the group was standing to see Takano, dressed in black with a cape and a beret. She also had a gun trained on the group. 'Wait…my dream.' Shinichi realised what this was. It was one of the previous scenarios. In this scenario, Rika's friends tried to save her but one by one they were killed by Takano, gunned down coldly by the woman before she dissected Rika alive.
He watched as Keiichi ran towards Takano, ready to swing her bat at him. 'No!' Shinichi wanted him to stop. A baseball bat couldn't beat a gun.
As Takano prepared to pull the trigger, Shinichi acted.
"Henshin!" Shinichi shouted as he summoned his belt and proceeded to call on his armor. "Let's Ride: Showa!"
Rika noted the bright flash of light but then her eyes turned towards Keiichi and Takano. There was a loud bang as the gun was fired. The bullet was flying towards Keiichi.
But it missed. Instead it was caught out of the air by an armoured hand. Keiichi froze, everyone gawked, and Rika's eyes narrowed at the sudden change in the scenario.
Keiichi's life had just been saved by a man clad in black and white armor with an insectoid helmet that sported antennae and a pair of green eyes. Stamped on his left shoulder was the number 13.
Showa looked towards Keiichi and shouted, "Run!" He shouted to the others, "You too! I'll hold them off!" Keiichi nodded and ran towards the group. They did as told and fled. Takano fired but her bullet was caught before it could hit anything. "You shouldn't play with guns," threatened Showa as he strode towards Takano and her remaining men.
"Shoot him!" she ordered and they did. They took aim at the unknown figure and fired.
"Let's Ride: X!" shouted Showa and he'd transformed into Kamen Rider X, armed with the Ridol. He used the staff to deflect the bullets, causing them to be imbedded in the trees. "Nice guns! Now check mine out! Let's Ride: Roborider!" He changed again, becoming the robotic RX Roborider, one of BLACK RX's alternate forms. "Voltech Shooter!" He aimed at the armed men with his gun and fired. His aim was true and he hit them without causing any mortal harm. He shot them in the leg, shoulders, and avoided hitting any vital points. They cried out in pain as the lasers hit them, causing them to fall.
Takano decided to try and shoot at Showa but in the form of RX Roborider the bullets just bounced off his armor harmlessly. She fumbled as she tried to reload her gun but then Showa shot her hand, knocking the gun out of her grip. She clutched her hand and glared at Showa.
Realizing her plan was a failure she fled. "Oh, no you don't!" he shouted. He gave chase. "Let's Ride: Amazon!" He assumed the form of Kamen Rider Amazon and gave chase by jumping along the trees. Takano was running for her life from this 'demon' who'd gotten in the way of her plans. She had to get away. She found the truck and went inside before gunning the engine. She would need to get out of the village and think of a new plan.
Showa wouldn't give her that luxury.
"Let's Ride: Super-1" he called out and in a flash he assumed the form of Kamen Rider Super-1. "Hot and Cold Hands!" he called out, donning his green gloves. He shot one of his arm hands forward and fired a cryogenic spray that coated the path. The wheels of the truck touched the ice and the lack of friction caused Takano to lose control and hit a tree. She survived, uninjured, and got out of the truck in order to continue towards the main road on foot.
Showa could let her go, but that would mean she would collect another group and try again. He narrowed his eyes. He would not let that happen.
To protect his friends, he knew he had to kill her. She'd faked her death before, but only this time it would be real.
However, he didn't get his chance. As Takano was crossing the road a bus came and the driver couldn't see her in time. She was hit and sent tumbling along the road as the bus stopped. The collision had broken her bones and most importantly her neck.
She was dead.
Showa stepped back from the road and into the forest. There was no need for him to do anything. A silver veil appeared behind him and it enveloped him, causing him to vanish.
"Ohayo Rika-chan, Hanyuu-chan" Shinichi waved as he entered the local shrine. Rika was doing some sweeping as she and Hanyuu were talking about something.
"Ohayo Shinichi-san," Rika smiled. "What brings you here today?"
"Well, I sort of made a discovery," Shinichi replied as he met up with the two younger (sort of) girls. "I don't mean to draw up bad memories, but remember how Hanyuu-chan would reset time when something happened to you?"
"How could I forget?" asked Rika, her voice deepening to the adult one she would use in private.
"Well, somehow, I ended up in one of those resets," Shinichi replied, causing Rika and Hanyuu's attention to snap towards him.
"W-what? How?" asked Hanyuu.
"Well, I was at the junkyard, looking for something Rena-chan might find cute as a gift," Shinichi explained. "Suddenly this silver veil thing dropped on top of me and I think it knocked me out."
"Au," Hanyuu gasped. It sounded to Shinichi like she knew what the veil was. He'd have to ask her about it sometime.
"Anyway, I woke up in the woods at night," Shinichi continued. "Then I saw all of you guys running in the woods from Takano and her men. I remembered my dream where she gunned everyone, but you, down in the woods with her fanaticism."
"I remember," Rika shivered. "I did not enjoy watching my friends die thanks to that woman."
"Well, when I saw it happening I intervened," Shinichi grinned. "I caught Takano's bullet and let you guys run away. I beat the crap out of her goons and she made a break for it. I chased to so to make sure she could never try it again, but a bus beat me to it. Creamed her right in the middle of the road."
"So it's a happy ending now! Au!" Hanyuu squealed happily.
"Hanyuu, is it possible that what Shinichi-san said is true?" asked Rika, surprised to hear her friend so accepting of the tale.
"Well, when I reset time I sort of brought Rika back to the point where the things began to change," Hanyuu admitted. "But the world which I brought Rika back from keeps going even thought I removed her from it."
"So that fits the dimensional decision theory," Shinichi nodded. Seeing their confused looks, he elaborated. "Some people say that for every decision we make, a new dimension is created to accommodate both ramifications of that decision. Like say, perhaps I decided to stay home instead of telling you this tale. A new dimension would be created for a world where I did that while this world accommodates my decision to tell you what happened."
Rika nodded. It made sense. In the previous worlds in which she had died, her friends made fatal errors and mistakes, causing changes. In one of those worlds, Keiichi was infected by the Hinamizawa Syndrome and bludgeoned Rena and Mion to death because of his paranoia. In another world Shion killed everyone she suspected of being responsible for Satoshi's disappearance. In another one Rena killed Rina and Teppei who were trying to cheat her father and then she became infected by the syndrome and held the school hostage because she believed an alien invasion was coming.
Basically, it was all cause and effect. A new world for each decision made.
Based on Episode 13 of Higurashi no Naku Koro ni Kai