This is a crossover fic that I got the idea for after watching Bleach and playing Kingdom Hearts within close proximity of each other. I'd say post KH2 and sometime after the Bount arc in Bleach would be a good time frame.
After the usual father and son brawl, Kurosaki Ichigo was sitting down to dinner with his sisters and father. All was as normal as it could be; that is if you were a teenaged Soul Reaper, your mentor and friend sleeping in your closet, restless souls and soul sucking creatures constantly attacking, losing copious amounts of blood every adventure you undertake, and dealing with Don Kanonji constitutes as normal for you. Though on the other side of town, something ominous was happening. Black portals opened and three hooded figures stepped out.
"Such an interesting new world," said one.
"With plenty of hearts just ripe for the taking," said the second.
"We shall get to that, after we get set up," said the third.
Back at the Kurosaki household, post after dinner brawl, in Ichigo's bed room, a cell phone went off. This isn't your ordinary phone either; this one can detect souls entering this world. Kuchiki Rukia flipped it open and looked at the top half. The closet door opened and there was Rukia in yellow pajamas (Borrowed from Yuzu) and Ichigo looked over.
"What is it now? A Hollow?" said Ichigo in a nonchalant manor.
"No. The reading is strange, almost like a Bount," said Rukia.
A small bird doll in a rain coat popped named Ririn and said, "I sensed the same thing to."
"Right then, time to investigate this supposed Bount."
After a quick transformation, Ichigo and Rukia ran down the streets and found the black robed conspirators. One turned its attention to the two Soul Reapers.
"What do we have here? A boy with an oversized sword and his girlfriend?" said the one.
"Hey you! Rukia's not my girlfriend! Besides, who are you and what are you doing here?"
The first stranger snapped his fingers and out of inky black portals came small black creatures with yellow eyes and antennae, Shadow Heartless.
"These should keep you occupied," said the first.
"Oh you're so bad, they don't even have the proper equipment to deal with Heartless," said the second.
"Don't worry Mercury; they should only keep them occupied."
The three strangers disappeared in black portals and the Shadows came closer.
"What are these things!? Are they Hollows?" said Ichigo.
"No, they don't have the spiritual force of a Hollow. Besides they called these things Heartless," said Rukia.
The Shadows came closer and Ichigo swung at them with his Zanpaktuo. The poor Shadow was obliterated by the oversized blade and a small shimmering heart flew off into the sky. Two more came from the left and those too were easily disposed of. Back at the Kurosaki household, Rukia and Ichigo were discussing the mysterious people.
"So those hooded guys came out of nowhere and sicked their little Hollow rip-offs at us. I want to know who they are and what do they want?" said Ichigo.
"They were almost like Bounts, but we need to wait for people to go to actually confirm that theory," said Rukia.
"I don't want to take a chance. We need to find these guys and stop them before they do anything."
The next morning at Karakura High, Ichigo met with his other friends Inoue Orihime, a busty red head that seems to lack an essential organ, Ishida Uyru, the group's Quincy, Yasutora Sado, the largest one whom everyone seems to call Chad, and Abarai Renji, a vice-captain of one of the thirteen Soul Reaper squads in the Soul Society.
"So you're saying that three people came out of know where, summoned these things called Heartless and left you to fight them off?" said Uyru adjusting his glasses.
"That's about it. Oh and they wore black cloaks, they gave of the spiritual force of a Bount, and one was named Mercury," added Ichigo.
"Hmm," said Sado, (Which is quite a bit considering the most he ever says is in internal monologues).
"If we could only find them," said Orihime.
"Well it's not like they're going to walk up and introduce themselves," said Renji.
From out of nowhere, three people walked up to the group that had been hiding underneath a tree. One was tall, had slivery hair and bright blue eyes, another was shorter and had brown hair and a bit of a goofy smile, and the last one was a girl with reddish hair and green eyes.
"Hey there," said the brown haired boy, "My name's Sora."
"My name's Riku," said the silver haired boy,
"And I'm Kairi," said the red head.
"We're here from out of town and were wondering if you guys would give us a tour," said Sora.
"Why us?" asked Rukia.
"We thought that you guys might have an interesting point of view on this world," said Riku.
"Hmm, you seem pretty strange, where are you from exactly?" said Uyru.
"Like Sora said, we're from out of town," said Kairi.
"Why don't you meet us at the playground, it's a pretty easy spot to get to," said Orihime.
"We had better get to class, it was nice meeting all of you," said Sora.
The three strangers went away and left the group to their own devices.
"These guys seem pretty suspicious. First Kurosaki's attacked by three people, and then these three show up," said Uyru.
"Well we don't know for sure, we should wit for them to do something suspicious first," said Renji.
"We had better get to class as well," added Orihime.
The group went their separate ways, after all, Ichigo, Sado, Orihime, Rukia, and Uyru had to go to school while Renji did all the dirt digging.
The three stranger, were discussing what had happened.
"Riku, why did you have to use world? You could have blown our cover!" said Sora.
"Well I don't know if there is more to this world than the city," said Riku.
"Both of you relax," said Kairi, "We need to keep this disguise just a little longer so we can find them."
After the usual Chizuru love attack and the Tatsuki based thwarting, and other random yet commonly occurring events the class finally got settled. The teacher, Ms. Misato, started class of by introducing two new students.
"This is Kairi and Sora, they're new here and will be joining our class today," said Ms. Misato, "Why don't you two go sit by Ichigo and Orihime?"
So they did and when Ms. Misato got to teaching, Ichigo started to interrogate Sora.
"So, where's your silver haired friend?" asked Ichigo.
"Riku's a year older than both of us so he's a grade ahead," said Sora.
Over by Orihime, Kairi was talking about their home.
"So where did you come from?" asked Orihime.
"Sora and Riku were born on an island, and I moved into town a long time ago. We met on the small island that was close to our homes and we were friends ever since."
"That is so sweet. I wish I could live on an island."
"Well its just land surrounded by water, not really much to get excited about."
"Well technically we are on an island right now but I talking about…" Orihime started off on one of her long rants and Kairi nodded patiently.
At the lunch bell, Ichigo's group was by the tree and the three strangers were on the roof.
"I don't like that Sora kid. There's something weird about him," said Ichigo.
"I did sense quite the spiritual force coming from all three of them," said Uyru.
"I don't know. That Kairi girl is pretty nice. She and I talked about her hometown and she even took one of my pickled marshmallows," said Orihime.
"How in the world do you pickle a marshmallow Orihime? And why on earth would you want to eat something like that?" questioned Uyru.
"I like them because they're sweet, sour and fluffy at the same time."
"Forget I asked."
"Strange food aside, I don't think we can trust those three," said Rukia.
Back on the roof, the three strangers were staring at the culinary oddity that is Orihime's cooking.
"I think I saw it move," said Riku.
"How could anyone stomach this?" said Sora poking it with a stick.
"I have now idea. She asked me if I wanted something to eat and she handed that thing to me," said Kairi.
"I hope she wasn't trying to poison you Kairi."
"Me neither."
So this is how part one ends, with suspicions, questions, villains, and pickled marshmallows. I figured Kingdom Hearts and Bleach would be a natural combination only because of some of the close likenesses. I hope you enjoyed this. Part Two is on the way.