Rimuru go to Different World

Ariel practicing dance by Milim

After Milim's spectacular dance concert in Tokyo, Ariel found herself in a new type of hell not the kind that involved fighting, blood, or battle strategies, but something far worse. Dance practice.

Milim, ever relentless when she became interested in something, was no longer just satisfied with dominating stages. Now, she had taken it upon herself to mold Ariel into something more not only in battle, but in areas like dance, which Milim seemed obsessed with perfecting. It was the worst possible fate for someone like Ariel, who could fight a thousand battles with ease but struggled to keep up with the fierce tempo of a dance routine.

“Come on, Ariel!” Milim’s voice rang out through the empty training hall, echoing like a drill sergeant’s command. “You’re not even trying! Keep your arms up, move your feet faster! How can you defeat your enemies if you can’t even keep up with basic choreography?”

Ariel, sweating profusely and stumbling through the moves, shot Milim a glare. “This… This is ridiculous! I was the Demon King, not some... backup dancer!”

Milim smirked, her bright pink hair bouncing with energy as she tapped her foot impatiently. “And that’s why you were a terrible Demon King,” she teased, twirling effortlessly. “You have no sense of rhythm. Now, again!”

Ariel groaned. In all the years of being humiliated by Milim, this was by far the most degrading. She could endure battles  she had done so for thousands of years but the unending dance practices, combined with Milim's bullying, were worse than any battlefield.

Yet this wasn’t just about dance. Milim’s bullying wasn’t random cruelty, as Ariel had learned over time. When Milim was interested in something, she wanted perfection, and that meant she would train, push, and break her targets until they reached their full potential. In Ariel’s case, Milim had already done so in combat, testing her limits until Ariel had lost much of her soul and power. But now, Milim wasn’t content with just that. She wanted to push Ariel even further.

It wasn’t just dance. Milim had even forced Ariel to undergo soul regeneration, an excruciating process that allowed Ariel to regain the power she had lost from the previous world system. When Ariel had been under the control of the administrative system, she’d burned through her soul’s capacity using skills like Humility and Gluttony. Now, without the system’s support, she had to develop everything on her own.

Milim had mocked her for it, of course. “Only an idiot like you would burn through your soul like that,” Milim had said. But there was a method to Milim’s madness. By forcing Ariel to regenerate her soul, Milim was guiding her into developing new abilities independently, even without the crutch of the old world system.

Ariel’s skills had returned though not as they once were. Gluttony, for instance, had become something far different. It had fused with her soul, becoming part of her very essence rather than a skill she accessed through the system. It now acted as a barrier against attacks that could damage her soul, protecting her in a way the old version never could. The ability had grown, too. It now created a sub-space, allowing Ariel to convert matter into energy, store it, and even analyze the information of what she consumed.

Of course, Milim hadn’t let her off the hook just because of that. No, Milim had made it clear that Gluttony wasn’t enough. “You’re going to learn how to use that ability to its full potential, or else,” Milim had said during one of their training sessions. And that’s when Ariel realized the extent of Milim’s ambitions for her.

Milim wasn’t just torturing Ariel for fun. She was breaking her spirit in battle to help her grow, and Ariel hated to admit it, but it was working. Every time Milim challenged her in the training ground, Ariel felt her strength growing not through sheer brute force, but through the refinement of her abilities.

One of the biggest changes was how Ariel’s soul now worked outside the administrative system. She no longer had the support that let her develop skills on a whim, but the tradeoff was that everything she developed was now a core part of her soul. Each skill was more powerful, more personal, and more intertwined with her essence. Her infinite regeneration had returned, as had her mana regeneration, though with limitations. She could only regenerate 10,000 MP per hour, which, while impressive, wasn’t what she had access to before.

Still, Ariel had adapted. She always did.

But the worst part of all this? Milim made sure Ariel never had time to rest. Whether it was battle training, dance practice, or simply enduring Milim’s whims, there was no escape.

“Break time’s over!” Milim shouted, snapping Ariel out of her thoughts. She skipped over to Ariel, practically bouncing with energy. “Time for the next routine!”

Ariel wanted to collapse. “Milim, I swear to everything, if you don’t let me rest for five minutes—”

“Nope!” Milim chirped. “We’re going to keep pushing until you’re perfect! Besides, this isn’t just about dancing, you know. This is about maximizing your potential. If you can’t keep up here, how will you ever face tougher enemies?”

Ariel gritted her teeth. “I can handle any enemy. I’ve handled you, haven’t I?”

Milim laughed, patting Ariel on the back, though the force nearly sent Ariel tumbling forward. “Oh, Ariel, you haven’t even seen the half of what I’ve got in store for you.”

It was true. Despite everything, Ariel had felt herself growing stronger. The new version of Gluttony allowed her to absorb not just matter but information, giving her insights into what she consumed. It also had an intangible quality now a weapon of sorts, one that could touch anything but couldn’t be touched in return. It was more versatile, and the corrosion and rot effects could break down both spiritual and material bodies. The catch? It wouldn’t work on someone with stronger willpower or protections like multidimensional barriers or advanced resistances.

But Milim didn’t care about that. She had plans for Ariel, plans that involved pushing her past the limits of what Ariel thought possible.

“Now, let’s see you perfect that spin!” Milim called out, her voice full of energy. “You’ve got a long way to go, Ariel!”

Ariel sighed deeply, knowing there was no escape from Milim’s relentless training. But as much as she hated to admit it, Milim had a way of making even the most ridiculous things like dance practice serve a greater purpose.

As the practice dragged on and Ariel continued to stumble through the moves, one thing became clear. Milim wasn’t just bullying her for the sake of it. She was preparing her for something bigger, something Ariel couldn’t quite see yet. And no matter how hard Milim pushed, Ariel knew she had no choice but to keep up.

Because if there was one thing Milim didn’t tolerate, it was failure.