Prompt: Isshin approves

Rating: T

To say she was surprised when he walked through the doors of the clinic was an understatement.

"Toshiro," she gasped, looking around in confusion, "What are you doing here?"

The boy in question wasn't even in a gigai, captain's haori fluttering in the air conditioning and sword still strapped to his back. "Routine check," he explained, bending down slightly to peck her on the lips. "I thought I'd stop by before I had to head back."

"How much time do you have?" Karin asked. "It's pretty much time to close the clinic anyway. We could go to dinner or something."

Hitsugaya shook his head slowly, clearly distracted. "No, I'm supposed to be back soon."

He was staring at her. Karin frowned. "What?" she demanded.

His head cocked to the side. "What…what are you wearing?"

On reflex, she looked down at herself. She saw the same practical white dress that she always wore. Usually, it hit conservatively at the knee, but hers was getting a little small, and the hem had creeped up a couple inches. She frowned self-consciously, adjusting her white little hat with the red cross on the front. "My nurse uniform. Yuzu and I wear it whenever we have clinic duty."

He didn't say anything, just continued to look at her, and that's when things seemed to click. She grinned mischievously. "Why, do you like it?"

He may have been a master of ice, but damn if his gaze didn't make her burn. When he met her eyes, there was so much heat in their cool blue color. "It looks nice on you," he conceded.

Karin closed the space between them, circling her arms around his neck. His automatically went around her waist, though his expression was mildly confused.

"How much time did you say you had?" she whispered into his neck. "Enough to help me change out of this?"

Hitsugaya inhaled sharply. She could hear his pulse quicken. "Karin, I don't think that's a good idea."

"Why not?" the dark-haired girl asked, idly twirling the baby hairs at the nape of his neck with a finger. She knew she wasn't playing fair, but she didn't particularly care at the moment. "We have the whole place to ourselves. Yuzu is at sewing club, Ichi-nii went back to his university last night, and my dad left five minutes ago to go buy groceries. All I have to do—" she detached herself from him, locking the door to the clinic and flipping the OPEN sign to CLOSED—"is this."

He visibly swallowed. "I don't know—"

But the oldest Kurosaki twin had already made up her mind. She pressed a finger against his lips, effectively silencing him. "We don't have time for talking. You're on a tight schedule, Hitsugaya-taicho."

Toshiro had been dating Karin long enough to know when he was fighting a losing battle, and it wasn't as if he had been been fighting this one very hard to begin with. He smirked. "Well then, Nurse. I guess it's time for your check up."

For a second, she smiled, and he was reminded of what made him fall in love with her. But then she waggled her eyebrows at him, grabbing him by the hand and leading him to the corner where the beds were.

When she pulled the curtain from around the bed, she did so with enough force that the curtain rings threatened to snap. But Hitsugaya was just as eager, scooping her up and practically tossing her onto the bed. Karin giggled when he slid on top of her, guiding his already searching mouth to hers.

They were both so eager, in fact, that they didn't notice the sound of the lock turning until it was too late.

"Can you believe I made it all the way to the store and forgot my—"

The couple froze, wide-eyed.

Kurosaki Isshin froze as well, his smile looking more and more sinister with each awkward second that passed.

"Maybe he doesn't see you," Karin whispered desperately from the corner of her mouth. Toshiro looked at her incredulously, removing his hand from beneath her dress in what he hoped was a discreet manner.

"Wallet," Isshin finished, his smile no less unnerving. His keys still dangled limply in his hand. "Hello, Toshiro."

It was as if they had both been touched by a live wire. They couldn't seem to get away from each other fast enough, Hitsugaya scrambling away from Karin so fast that he tumbled onto the floor. Their faces were an unhealthy shade of puce.

"Daddy," Karin squeaked.

"T-Taicho," Hitsugaya stuttered.

Isshin glared. "Don't you two think you're too young to be doing that?"

Karin's heart was beating so fast, she could hear her pulse in her head. "Well…I…"

"…Without protection?" her father finished, the happy grin from before back on his face.

The couple's jaws dropped, and they looked at each other in confusion.

"I know I'm always teasing your brother about grandkids"— Isshin walked to the front desk, rustling around until it produced his wallet—"but you're still too young for that, Karin-chan. You have to make sure to use protection!"

Her brain was going to explode. It felt like it, at least. "What."

"Condoms are in the nightstand next to the bed!" the dark-haired man informed her, already halfway out the door. "They might be those silly bunny ones your brother left behind, but they'll get the job done." He winked. "Have fun, you two!"

They watched as he left the clinic, locking the door behind him.

From his spot on the floor, Hitsugaya was now looking a little green around the edges.

Karin was waiting for the gods to just smite her down and get it over with. "OH GOD. HE THOUGHT WE WERE GOING HAVE SEX!"

"We were going to have sex," her boyfriend answered, almost absently.

"Yes, but now HE KNOWS FOR SURE AND HE ACTUALLY LEFT SO WE COULD DO IT AND—" Horrified, she yanked open the top drawer of the nightstand next to her. Chappy's face smiled at her from little foil rectangles.

"OH GOD!"