I don't own K-ON or Kamen Rider and they belong to their respected owners.

It was a nice day in the summer of June as a young man in a motorcycle stopped by in front of the school. A young man removed his helmet to reveal a young man with dark black hair and brown eyes. This young man is Tomiji Todo.

"This should be the place Zanki told me about," Tomiji said. "Hmm, a Makamou wouldn't be here out on the open so then where…"

Tomiji got off his motorcycle and check the area out as he releases a couple of Disks Animals.

"I hope they'll find something."

~/~

"Now that class is over we can start practicing for the next concert," Ritsu says.

"We should finish our homework first," Mio said.

"Yeah, we should get out of the way first," Yui agreed.

"Fine," Ritsu grumbled, but stop when she spotted something outside the window. "Huh?"

"What is it Ritsu?" Mio asked.

"There something there," She pointed at the window.

The two girls look out the window to see a small green creature walking to the forest.

"What is that?" Yui asked.

"I don't know but I'm going to find out," Ritsu said as she ran out to the school exit.

"Wait! Ritsu!" Mio shouted as she and Yui chased after a curious girl.

After a 15 minutes chase, they finally caught the small creature and Mio and Yui caught up to Ritsu.

"Ritsu, did you really have to chase that thing," Mio growled as she tried to catch her breath.

"Yes, because look what I got," Ritsu opens her palm to see the small green creature.

"What is it?" Yui asked.

"I don't know but it looks like a gorilla right," Ritsu commented.

The green gorilla started doing gestures and make noises trying to get the girl's attention which luckily it did.

"What is it?" Ritsuka asked.

It was pointing at the end of the forest which led to a stony beach.

"You want us to take you there?" Mio guessed.

The small gorilla nodded. The girls walked to the direction it was pointing. When reaching the stony beach they saw a young man facing a giant crab monster. Why did this thing bring them there?

~/~

One of the Ryuku Ozaru found three Bakegani at the stony beach. This is the lucky day he can show Zanki his style. Now he was in front of one the Bakeganis'.

Tomiji raised his arm up which reveals a bracelet on his wrist, with an Oni face and a chain with a ring attached to the end. This is Henshin Kigen Onjō.

Nagisa pulled the chain making the Oni face slide upward revealing three strings. He strummed it, making it release sound waves. He placed it against his forehead until an Oni face appeared.

He then raised his arm before lighting struck him out of nowhere. When the lighting vanished, an armored figure took his place.

He had a dark green bodysuit with a strap around his chest, white gloves, and belt; his helmet had an onyx visor with white facial markings and a horn on top.

This is the Oni Rider Todoroki.

TODOROKI (轟)

He dismissed the smoke and soon grabbed his Ongekigen. He ran towards the giant crab, said crab tried to hit him with its claws but only for Todoroki cut the crab's arms off. That didn't stop the Bakegani as it still came towards the oni. It lifts itself up hoping to squish the green oni only for Todoroki to stab his guitar into its stomach.

Todo placed his Ongekishi onto his Ongekigen.

"Ongeki Zan Raiden Gekishi!" Todoroki announced.

He starts to play his guitar wild and fast. By doing this, the vibrations of his weapon are directly transmitted to all the organs of the Makamou, causing it to explode.

"Heh, that's 1 down," Todoroki says as he ran off to another direction to find another Bakengani and stab in the stomach. "Ongeki Zan!" Todoroki began to play his guitar sending the vibration at the giant crab and causing it to explode.

Todoroki then ran to destroy the final Makamou and jump from a cliff to stab an upside Bakengani. "Ongeki Zan!" He placed his Ongekishi onto his Ongekigen and started playing his weapon sending the vibration of the Oni weapon and destroying the final Bakengani.

His Disk Animal, Ryoku Ōzaru ran towards him. Tomiji gave the disk animal a thumbs up before saying. "June third! Exterminate three Bakengani!" Tomiji grinned as he started doing a guitar solo with the Ozaru intimidating him and recording his actions.

ROAR (轟く)

"Ha, now that felt great!" Tomiji said as undo his Oni transformation.

"Ahhhh!" Female screams were heard making Todoroki turn around to see school girls covering their red faces. Who were those girls and why are they covering their faces?

The thunder Oni was about to call them out till he felt a light breeze on his body. He looks down to see he was totally naked. His eyes became saucers as he covers himself. Dammit, he thought he fix his transformation but it looks like the lighting still destroys his clothes.

"Um, do you girls see my bag up there?!" Todorki asked them.

His question was received when a brown back was thrown towards him. He grabs the bag and ran behind a big enough boulder to hide him.

After he puts on his clothes, he went to meet the girls who were watching him battle as an Oni. When he arrived at their location he can see they are high school girls probably second years, what were they doing here?

"Can you tell me who you are and how did you know I was here?" Tomiji asked.

"To answer your first question my name is Hirasawa Yui and these are my friends; Akiyama Mio and Tainaka Ritsu," the brunette introduce herself and her bandmates.

"And how we found you…" Mio started.

"I saw the small gorilla and followed it," Ritsua answered. "I decided to follow it and Yui and Mio started to follow me…"

"And it told us to come here," Yui finished.

Tomiji sighs. "That's my Ryoku Ōzaru."

"That's what its called?"

"Yeah, they're my Disk Animals to help me find any Makamous," Tomiji says.

"Makamous?"

"Monsters that eat people," Tomiji answered. "I was lucky to kill these three."

"Okay, last question what was that green outfit of yours," Ritsuka asked.

"That's my Oni form," Tomiji replied.

"Oni form?" Yui tilts her head.

Tomiji smirked as he brought out his Ongekigen, "I'm the Thunderous Oni!" He then plays another guitar solo with his guitar-like weapon. "Todoroki!"

TODOROKI (轟)

AN: I thought this crossover for while and I never finished it till now. What do you guys think? It's not much but I'd finish so I don't have to think about it anymore. Also sorry for the title it was all I can think of.