Why my writing may be inaccurate:

I have no knowledge of the TBHK storyline beyond the anime other than the few wiki pages and descriptions from some friends... maybe I'll read the manga, but I liked TBHK mostly because of the lore of supernaturals, not the romance of Yashiro and Hanako.

Also! Sorry this took a while, I wanna make this as good as possible. Enjoy!!

(This is my take on the 7 Wonders,  but if anything seems out of place don't hesitate to drop a comment! >;D )

"YOU DID WHAT!"

"I stabbed him. I'm pretty sure it should hold him back for a moment."

"What- did- you stabbed- you-"

Mitsuba threw his hands up in the air frantically.

"We're both in trouble, and it's all your fault!"

"We're both out of the trouble, which is Tsukasa-sama." Y/N corrected, pulling Mitsuba by the arm as they ran down the halls of a moonlit Sukora. The classrooms were empty and ridden of their usual buzz of student chatter; a perfect time to go sneaking out to...

"...Kamome." Mitsuba frowned. "You're visiting him again, aren't you?"

"'Him?'" Y/N turned to her friend as he stopped in his tracks. Even when she held his hand tightly, he didn't move an inch. "And how do you know about Kamome?"

"You think your bonding won't reach the ears of at least one wonder?" Mitsuba rolled his eyes. "He's a 7th Wonder. He's a leading Wonder, at that. And Sewing Girl mentioned he has a pink bunny for an assistant."

"That's true." Y/N nodded.

"He flirted with you. He also pinned you to a tree-"

"Not  true." Y/N cut in hastily, to which Mitsuba rose a brow.

She was glad they had finally reached the bathroom. As Y/N slowly swung open the cubicle door, she looked at Mitsuba expectantly. For the first time, he stayed put.

"Mitsuba?" Y/N queried impatiently.

"Y/N, I don't know this Hanako-guy." Mitsuba looked up at her, frowning. "What makes you trust him so much?"

"Think of Tsukasa's good traits."

The ghost didn't know what his friend was getting at, but with the intensity of her E/C gaze on his, he slowly counted off.

"He saved our lives... he, uh... sometimes helps us-"

"Now think of the bad traits."

Mitsuba instantly grew more confident in his words.

"Touchy, creepy, capricious as the weather, condescending..."

Y/N had a feeling if she didn't stop him, he'd go on for decades. She folded her hands, looking at the wide open crack that would lead to the Rift.

"Hanako is the complete opposite-"

"-are you sure? What with the touchy part-"

"-he doesn't hide anything; I'm even sure I saw a glimpse of his past. If anyone can tell the truth between the two twins, it has  to be him."

Mitsuba pursed his lips, trailing his fingers down his scarf in uncertainty. He was Y/N's assistant, yet she confided in a stranger she had just met over him?

"So he's Tsukasa's brother." He murmured.  "I don't trust him with just that, but I trust you, Y/N."

Y/N brightened up instantly seeing that Mitsuba would roll with her plan again. She rambled on, impervious to him still feeling like he was failing as her second.

"I want to stay in Kamome for a day after we pay him a visit." Y/N said. "I'm sure Hanako would let me stay to discuss Tsukasa... and our memory, hopefully - more briefly. Mitsuba, the 7 Wonders of Sukora are all accustomed to your presence; you can take care of them for a while, right?"

Mitsuba nearly stumbled back, voice raising."Me?!"

"I trust you too, Mitsuba." Y/N smiled brightly.

He would've been grateful, if it didn't mean that Y/N would be leaving him yet again. Why was she keeping so many things? What did he not have that Hanako did? He felt a familiar surge of not wanting to be forgotten; it gave him a weird feeling of deja vu. Had he felt that way before? Had he wished for it?

These impending thoughts he tried to put in one, pained sentence:

"Why can't you stay in Sukora? People will miss you!"

"What people?"

Mitsuba flushed red, wondering how to say "me" without sounding like a sappy idiot.

"I... well..."

"That's right." Y/N nodded. "No one. Everybody in Sukora thinks I was a terrible replacement for the old Aka Manto. If I've got to prove myself  by revealing Tsukasa's true identity, maybe that'll change."

Mitsuba perked up at those words. Tsukasa's true identity? Now that  was something he wanted to see.

"He's hiding something from us." He agreed.

"And if he won't say the truth, we'll find out for ourselves."

Mitsuba glanced at his friend in a mixture of admiration and fear. How can she be so confident against the likes of Tsukasa? Sometimes it would make him feel overwhelmingly inferior.

Holding her hand to calm his shakiness with plunging to the unknown yet again, Mitsuba slowly followed Y/N to the split in the air. She noticed his trembling, then smiled goodnaturely.

"Don't be afraid." She gave him a friendly nudge.  "I'll make sure we stick together!"

"You better."

~

Of all the things that could bring her memory back, Hanako never knew he would have to resort to his past. Like any other's, it was a very personal thing; only difference was that it was dark, tainted with blood and violence, and not something he would want Y/N to see.

"Number four." 

Shijima slammed shut a sketchbook, whirling around in surprise."

"Honorable No. 7!" She pushed her glasses to the bridge of her nose, clearing her throat. "What trouble have I stirred for you to pay a visit?"

"It's not that." Hanako waved dismissively, approaching her where she sat. Shijima let out a little sigh of relief and opened her sketchbook a crack. He stole a glance at the pages, and nearly doubled over laughing.

"Are you drawing cuddling positions?"

"Don't stick your nose in my business." Shijima furtively placed down her sketchbook on the desk; how she found space, Hanako had no clue. It was littered with paint bottles of midnight shades, thousands of brushes, and two extra canvases.

"I'm practicing couple poses out of boredom-" Hanako tilted his head, clearly not believing it. He didn't press the point as Shijima shot him a glare. "- a big deal of my sketchbook is not for the public eye and... anyway! Back to the topic at hand?

"Can you do a painting for me?"

Her narrow, hostile eyes grew wide.

"Huh." She was startled by how teasing the toilet ghost had just been; suddenly, he looked deathly grim. "You look really serious about it too. What's the deal?"

"I need someone to get their memory back." Hanako continued, unwilling to share Y/N's history.

"Piece of cake. Describe their past."

"I can't do that."

"Then I can't help you."

Hanako sighed. Even if she didn't know it anymore, he didn't want to share Y/N's past. That was something she had only told him, and if she felt it should be that way, he would keep it that way.

'If we throw out her past to her in one big wave, it will be like a huge slap in the face with reality.' Tsuchigomori had said. 'And this will confuse her and put her in an unbearably hysterical state. We can't afford Y/N getting more break downs.'

The teacher had gestured to the mokke with the huge gash on its stomach, one ear listening to his fellow pink comrades, and one ear to Tsuchigomori's words. 'She's incredibly destructive when she's lost and angry. I don't know how long she can endure that.'

"I want you to draw Kamome Gakuen in my time," He murmured quietly, keeping his teacher's words to heart. "Paint anyone you want, except me."

She squinted her eyes with interest, but Hanako didn't elaborate any further, only looking at her expectantly. She slowly got her paintbrush, shrugging it off.

"As you wish."

~

In the meantime, a pair were glossing over Y/N's book. It would've been a fine pair work, if it weren't for Yako complaining and hissing every minute about how Y/N was a waste of time.

"Why do we need to save Hanako's love interest?" Yako yowled dramatically. "I'm only playing along so that the boy can stop droning on and on about love! He's so lost in sadness he can't focus when he needs to help a Wonder!"

"If anyone is droning on and on, it's you." Tsuchigomori huffed into his pipe to weather down his frustration. With the kitsune being impatient and the teacher calm and collected, they obviously complemented each other for the plan well.

"So let me get this straight." The kitsune sighed, curling her tail in her paws. "The plan is... Yashiro and Kou will guide Y/N to No. 4, Hanako'll hopefully kickstart her memory with a painting, and Osane will make sure nothing goes wrong?"

"Precisely." Tsuchigomori nodded, turning a page of Y/N's book. "If something does  go wrong and Y/N goes on a rampage, me and you will hold her down."

He ran a finger through a page thoughtfully, devoid of any blood.

"I don't want the plan going drastically wrong, and fortunately her book doesn't mention dying or hurting of any sorts."

"All for a girl!" Yako whined yet again. "All because of a girl!"

"Between you and me." Tscuhigomori leaned forward to face the kitsune. Yako immediately shut up, seeing his calm expression suddenly creased in an eerily warning frown. "This isn't just for Hanako. It's about the balance of us supernaturals and living as a whole."

As brash and snappy as Yako was, even she cared for the balance greatly. Even if her rumors demanded she be harsh, she obeyed them no matter how painful - the only mercy being a supernatural gave was time. A time to get used to being cruel. She nodded for Tsuchigomori to continue.

"Osane, the previous 7th Wonder of Sukora, claims that Tsukasa all has a say in this." He continued grimly. "She said that it's beyond boredom and mischief. He actually  has something planned, and it could affect all of us drastically."

Yako's ears went down in horror. "He wants to tip off the balance?"

"Not only that." Tsuchigomori murmured.

"As much as I hate gut feelings, it all makes sense. Hanako is his one obstacle. Y/N is the pawn to bring him down, whether emotionally, physically, or both."

Yako stared at Tsuchigomori, stupefied by this revelation.

"That's rough, buddy." A Mokke popped out from under the desk.

Yako jumped into the air in surprise like a cat to a cucumber. Tsuchigomori was less frightened.

"What are you doing here?"

"Yashiro and Kou have got Y/N!"

"Succesfully?"

"Uh..."

~

Earlier...

"YOU SAID WE'D STICK TOGETHER!"

"I SAID!  NOT PROMISED!"

Y/N screamed as the giant, skeletal bird that held her tore into her red coat. It's head loomed over her terrified expression, ghostly white face hollow and expressionless except for two glowing blue orbs for eyes. The beak, which was big enough to snap her head in half, narrowly missed her.

Mitsuba was being held by another similar looking giant bird, only the eyes were red. Their talons were sharp and could pierce through skin; it was a wonder how both of them were still alive to argue.

"JUST LISTEN!" Y/N tried to shout over the angry squawking of Mitsuba's skeletal bird as it nipped at his scarf (because scarves were priority, at least for him.) "IF WE CAN DISTRACT THEM-"

"WHY DO YOU ALWAYS ENTER THE BAD BOUNDARIES IN THE RIFT!"

"MITSUBA-"

"Y/N-"

"OUTTA' THE WAY!" A new voice that was unknown to them both boomed. Blue shocks of electricity coursed through the dark, cavernous cave. For once, both Y/N and Mitsuba agreed on something, using the stunned reaction of the birds to the mysterious lightning to wriggle free and roll to freedom.

Mitsuba cried his friend's name, reaching out a hand helplessly as Y/N was flung a good meter away from him, hitting her head. He tried to get up, but a dead skeletal bird crashed in front of him.

"AIEEEEEE!" He screamed in terror.

"EEEEEEEK!!!" Someone impossibly screamed louder and higher.

He whipped around to see a red-eyed girl with silvery hair, a soft green at the tips. The first thing Mitsuba noticed other than her terrified expression was her fat ankles. She screamed even more as a second skeletal bird fell beside the other.

"WHO ARE YOU?!" Mitsuba cried, thinking she was the one who had shot the lightning.

"WHO ARE-" The girl turned, hands to her chest in a pathetic defensive pose, but as soon as she settled her eyes properly and calmed herself, she leapt for joy.

"Mitsuba!" She exclaimed.

"Woah, woah!" He crossed his arms. "How do you know my name, daikon legs?"

"Daikon-" Yashiro scowled, when the unknown male voice piped up:

"Mitsuba?!"

Mitsuba turned to see a blonde boy with wide, electric blue eyes, staring at him in awe. Lightning died down in the tip of a funny-looking golden staff. The ghost assumed he was the one who had saved him and Y/N.

"Alright, now what's up with you guys knowing my name?"

He missed Kou's look of pure delight, eyeing Y/N stirring from behind the exorcist and the two stunned skeletal birds.

"You're okay!" Mitsuba cried, running forward. He opened his arms in a hug.

"Of course I am!" Kou did the same, running faster.

Mitsuba rushed past Kou.

"Oh my god." The pink-haired ghost nestled his head in Y/N's shoulder as he embraced the trembling 7th Wonder, still stunned from hitting her head against a rock. "I thought we were finished, you idiot..."

Kou looked to the side to hide his disappointment. Yashiro raced towards them, not wanting to miss the party.

"Y/N! Mitsuba!"

"How do you know us?" Y/N croaked, slowly standing up. "Answer."

"We'll do that later!" Kou looked impatient. Precious time was being wasted. Hanako couldn't wait forever in Shijima's painting.

"No."  Y/N drawled.

Yashiro and Kou's eyes went wide as Y/N held her knife in front of their faces, putting her mask on her face. Mitsuba stood by her side protectively.

"Answer now."