In HxH with Doraemon Pocket

Bisky had created her Nen ability, Magic Beautician: Cookie-chan, solely for maintaining her appearance. It had no combat functionality whatsoever and offered no advantages in battle.

This showed just how much Bisky valued her looks—enough to sacrifice combat potential entirely.

So, it was no surprise that she reacted so strongly to the Age Fountain Rope's miraculous properties.

"Of course, it works permanently," Morin affirmed seriously. "And it won't revert during battle, injuries, or other situations. The moment you drink the spring water, the effects are immediate and irreversible—no rebound."

"What's most remarkable," he continued, "is that it only reduces age—nothing else!"

"In other words, even if your age decreases, your Nen mastery and physical strength remain intact!"

Morin referenced the original scenario he remembered: Nobita and Shizuka had used similar water to become adults. However, their intelligence, personalities, and physical maturity had all remained at elementary school levels.

The same wouldn't happen here. The spring water only changed age, leaving abilities like Nen intensity and stamina unaffected.

This was why Morin found the tool so extraordinary and powerful.

Just imagine:

A seasoned Nen master with decades of refined power but a failing body. If they drank this spring water and regained their youth, what kind of terrifying strength would they unleash?

Or, what if they reset to the age of twelve or thirteen and started training again? The potential for their future growth would be unimaginable.

This thought made Morin shiver with awe when he first drew the tool. He'd even double-checked to ensure he wasn't mistaken.

"A tool like this actually exists?" Bisky's delight was evident, but soon, a cautious expression crept into her eyes.

"This water—are you sure it doesn't have side effects?" she asked warily. "Even if it doesn't, tools with effects like this must have significant restrictions, right?"

Nen abilities followed the principle of equivalent exchange. The stronger the effect, the stricter the conditions.

Her skepticism was natural.

"Of course, there are conditions and limitations," Morin admitted with a smile, placing the Age Fountain Rope on the table and locking it into a circle.

"But they're manageable."

He pressed the blue button, and deep blue water began to bubble from the circle, pooling onto the tabletop.

Morin filled a clean glass with the blue water and handed it to Bisky. Then, he poured himself a cup and drank it in one gulp.

"Just one year—it's not that noticeable," he said after wiping his mouth. The water was slightly sweet.

"No, I can see the difference!" Bisky exclaimed, her sharp eyes studying Morin.

Age was most evident in skin and body condition, and Bisky's keen observational skills made it easy for her to notice the subtle changes.

"So, this spring water really works?" she murmured, gazing at the glass in her hand.

She hesitated. What if the water had hidden rules she wasn't aware of? What if drinking it placed her under someone else's control?

While she wavered, the glass suddenly left her hand.

"This miraculous spring water—I'd like to try it too."

Both Bisky and Morin turned in surprise as Pakunoda, without hesitation, raised the glass and drank it all.

"It's quite sweet," Pakunoda said, smiling at Morin. "And I wouldn't mind seeing if I can grow a year younger."

Morin felt a warm twinge in his heart.

Pakunoda's actions weren't just to test the water's effects—they were a demonstration of her complete trust in Morin. She also wanted to reassure Bisky of the water's safety.

Bisky glanced between Pakunoda and the blue spring water, then smacked her forehead lightly.

"Honestly, the older I get, the more suspicious I become."

She gave a self-deprecating laugh. "I can't believe my courage is less than that of a girl barely in her teens. How embarrassing."

With a small chuckle, she took the cup back from Pakunoda.

"You're already young and beautiful enough—you don't need to drink this," she said playfully, tossing Pakunoda a wink.

Then, without further hesitation, she filled her cup to the brim and drank deeply.

"It really works!!"

Bisky was overjoyed as she felt the changes in her body.

"My skin! My face! My height! My—uh, are you okay?"

She paused mid-celebration, noticing Morin's face had gone a bit pale. Concern flickered in her eyes.

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