"Huh? Why, though?" Naruto didn't follow.
"Maintaining a Transformation while tree-climbing trains your chakra with much finer precision than either exercise alone." Hanabi kept the explanation brief.
"Is that really necessary?" Naruto wanted to get stronger, sure—but without the Land of Waves arc bearing down on him yet, he hadn't developed the resolve that would define him later. He'd honor the bet, but the reasoning felt like a stretch.
This was Hanabi's call, though. He'd lost, so he'd go along with it. Naruto shifted fully into his cute twin-tailed girl form and got ready.
"Idiot." Sasuke crossed his arms, eyes sharp, watching Naruto with barely concealed contempt.
Then the twin tails swayed, and Sasuke's gaze drifted away on its own.
"Under normal circumstances, chakra can't be stored in large quantities for extended periods. Certain conditions allow it to persist or accumulate over time, but for most people, chakra is drawn on as needed."
"Chakra is a fusion of mental and physical energy. When we use chakra, the first step is combining those two types of energy together—that process is what we call chakra refinement. Mental and physical energy exist within our bodies, but they can't be extracted all at once."
Hanabi was technically explaining it to Naruto—but the real audience was everyone watching.
Presenting worldbuilding clearly was one of the most reliable ways to grow a viewership. Getting the audience invested in the world itself, not just the main character, was what built long-term attachment. And that, in turn, generated popularity.
An idol couldn't always make the camera point at herself. Sometimes she had to make the audience aware that a broader, richer world existed around her.
This topic had already been touched on in Episode 2, in the scene with Konohamaru—but it hadn't been expanded on. Back in the discussion threads, she'd also noticed viewers comparing chakra to internal energy. She wanted to nudge that perception in a more accurate direction.
Gently correcting a misconception also helped cement her own presence in the audience's memory.
[I get it—ATP, glycogen, and fat]
[What?]
[Basic biology. The body uses ATP for immediate energy, then glycogen, then fat. Mental and physical energy are like glycogen and fat. Chakra is the ATP]
[That's why losing weight is so hard—you have to burn through glycogen first]
[Oh no, now I'm feeling personally attacked]
[Stop, stop, this topic is terrifying]
The science sidebar worked—though the chaotic commenters had, predictably, sent it sideways.
"Improving chakra control means improving the efficiency of every unit of chakra you produce. One part does the work of two. Sustaining a continuous, precise output also strengthens you over time." Hanabi concluded.
"In other words, through constant, refined chakra maintenance, you train your control. Idiot." Sasuke translated for Naruto in four words.
"Let me put it this way," Hanabi said. "Using Fire Style: Fireball Jutsu—after three consecutive casts, Sasuke is winded, and his movement starts to degrade. Under equal conditions of stamina and mental energy, I can sustain five without my combat readiness dropping."
"Ohhh!" Naruto lit up—and took mild offense at the earlier "idiot."
"You're best known for the Sexy Jutsu, Naruto—it's even taken down the Third Hokage. That's exactly why I'm having you hold the Transformation throughout."
"Heh, it's not that impressive..." Naruto, after being sweet-talked by Hanabi for a while, actually looked a little embarrassed.
"Can chakra not be stored at all?" Sasuke had his own question. He came from a great clan—but the clan was gone, and much of what he should have known by now had never been taught. Hanabi, a Hyuga, naturally knew more.
"There are exceptions. Lady Tsunade's Strength of a Hundred Seal, for instance, stores chakra continuously over time."
"Tsunade?"
Naruto tilted his head. No idea who that was.
"One of the Legendary Sannin." Hanabi didn't elaborate further. "Beyond that, in rare cases, chakra can be passed down genetically—or carried forward through reincarnation. That's frontier-level research, though. Still under study. Nothing you need to worry about right now."
Chakra as a fusion of mental and physical energy—because it held will, it could be carried across lifetimes; because it was tied to the body, it could be inherited. Simple enough.
"So the short version: think of it as resistance training at the chakra level," Hanabi said finally. "Naruto—during the tree-climbing, keep this form the whole time. If you revert, transform again immediately. Keep going until you can't sustain the chakra anymore."
"Oh! Why didn't you just say that?!" Naruto's face split into a grin. "I totally get it now!"
That's all it had taken?
"Idiot." Sasuke had lost count of how many times he'd said it today.
"This is only the most basic knowledge," Hanabi added. "Real chakra growth depends on a stronger body built up over years, and a tougher mind. You can't rush those. So for now, improving your efficiency is the best path forward—work hard."
[Wait, so chakra isn't like internal energy at all?!]
[Yeah, I always assumed it was the same concept. Huh.]
[Someone should write a post breaking this down properly. I might do it]
[Isn't chakra originally from Indian spiritual concepts? Something to do with energy centers?]
[Oh, you mean like chakras / energy wheels? That'd make sense with the whole mental-physical fusion thing]
The science sidebar had done its job—though the viewers had predictably gone sideways with it.
[No wonder Kakashi said it was rare for Sasuke to pull off Fire Style—he's so young, his body's still developing, so his physical energy is just limited]
[Makes sense. A nine-year-old can't out-muscle an eighteen-year-old no matter what]
[Nine is too old. Eight works]
[Let that one marinate for a second]
[Wait, EIGHT?!]
The chat had, somehow, drifted into movie and TV territory.
"One more thing—after training, you don't have to go all the way back home. I have a guest house nearby. I've had it prepared."
A training camp was one of the most reliable ways to deepen bonds between people.
"Just you wait—I'm going to be at the top of that tree by the end of the week!" Naruto punched the air, twin tails swinging.
[I mean... he was a reckless hothead a moment ago, and now he's doing this with twin tails—and somehow I find it kind of cute?]
[I think I might genuinely—]
[Easy. That's a guy]
[All the better for it!]
[No—actually, without the Transformation, even better]
[???]
[Grass (a plant)]
[Why are there always wildcards in this chat?!]
[Honestly? Naruto doesn't even need the Transformation—just slap a twin-tails wig on him and you're done lol]
[My buddy said he needs to go cool down for a minute]
A wave of comments swept through.
Hanabi checked the feeds from other regions.
The Japanese comment section was flooded with "Naruko wwww"—viewers had spontaneously assigned a feminine nickname. The European and American sections were sparser; she'd need to check written reviews to get a real read there.
"Huh—popularity went up again?"
Her reserves had been running low, but somehow she'd accumulated over three thousand new points.
This episode had been unexpected to begin with, and she'd just been having fun—she hadn't thought the numbers would move.
"Does this mean popularity gained through changes I trigger in the main cast gets attributed to me?"