The technique of her right eye is "Kotoamatsukami."
The technique of her left eye is "Replication."
Unlike the ordinary Sharingan's ability to copy ninjutsu through visual analysis of chakra flow and hand seals—something Kakashi Hatake famously refined into his "Copy Ninja" reputation— Chinatsu's left Mangekyō ability goes far beyond normal imitation. Even S-rank forbidden techniques, advanced elemental transformations, and bloodline limit techniques (kekkei genkai) can be reconstructed and reproduced after observation.
The only limitation is chakra consumption. Each replicated technique requires several times the original output, meaning even with her chakra reserve—approximately three to four times Kakashi Hatake's baseline level—sustained combat copying would still be inefficient. However, in terms of theoretical potential, this ability rivals some of the most abnormal ocular powers recorded in Uchiha history.
Before Chinatsu could properly test the power of her newly awakened Mangekyō Sharingan, both eyes automatically shut down due to exhaustion.
Chinatsu exhaled heavily, eyes closed, leaning against the wall as chakra fatigue set in. The first activation of Mangekyō Sharingan is always described in Uchiha clan records as extremely draining, often leaving users temporarily incapacitated. Even prodigies like Itachi Uchiha and Shisui Uchiha were noted to experience heavy chakra strain after prolonged use.
She staggered back into the living room and collapsed onto the sofa with a dull thud.
Still… this is a massive gain.
"But I need to solve the chakra issue… Tailed Beasts? Sage Mode? Toads are out of the question."
Chinatsu lay flat on the sofa, one hand covering her forehead as she muttered.
Across the shinobi world, there are only a few known ways to drastically increase chakra capacity.
Tailed Beasts function as near-infinite chakra reservoirs, granting jinchūriki access to chakra levels far beyond normal shinobi limits, often directly pushing them into Kage-level combat capability or higher, as seen in jinchūriki like the Eight-Tails' host in Kumogakure.
Then there is Sage Mode.
Sage Techniques are known to originate from three confirmed summoning regions:
Mount Myōboku (toads under Fukasaku and Shima's lineage),
Ryūchi Cave (snakes associated with Orochimaru and later Kabuto Yakushi's experimentation),
and Shikkotsu Forest (slugs connected to Tsunade Senju's summoning contract lineage).
Toads… snakes… slugs…
Chinatsu covered her face slightly, expression twisting.
Honestly… I don't really want any of these contracts.
If she had to choose, snakes might offer the best adaptability and secrecy. But considering future combat dynamics and medical support compatibility, slugs were actually the most practical long-term option.
"…Forget it. At least today was productive. If I meet Shimura Danzo again now, I won't be completely helpless."
She muttered and stood up from the sofa.
What next?
For a rare moment, she decided to slow down. Even chakra-heavy training required recovery.
"Bath."
She sighed and stretched lazily.
As one of Konoha's founding clans alongside the Senju, the Uchiha compound was equipped with private facilities far beyond ordinary civilian standards. Their bathhouse functioned almost like a small hot spring system, separate from public facilities in the village.
According to Chinatsu's inherited memories, she had previously been forbidden from using shared bath spaces, even within clan territory—she was required to bathe alone due to "proper lady conduct" expectations.
Traditional to a fault.
She returned to her room, grabbed a yukata, and walked toward the bathhouse.
The moment her feet entered the hot spring water, her entire body relaxed instantly.
"…This is dangerous. Too comfortable."
She sank into the warm water, muscles loosening as chakra tension faded slightly.
Then, with completely unnecessary confidence, she pulled out a bottle of red wine that had been stored in the residence.
Pop.
The cork opened cleanly.
She poured herself a glass.
Normally this was meant for ceremonial toasts during clan gatherings. Today, she drank it alone.
Glug… glug… glug…
"…Ah."
Within seconds, her expression shifted.
At first nothing.
Then the world tilted.
The ceiling began to spin.
Even the hot spring water seemed to rise unnaturally, defying logic like a genjutsu-induced distortion.
"…Hic… hic…"
Her body swayed lightly before she leaned back and drifted into unconsciousness.
Twenty minutes later.
Naruto Uzumaki and Sasuke Uchiha returned from the Ninja Academy as usual.
"SISTER!!!"
Naruto's voice echoed through the house.
No response.
"…She's not here?" Naruto tilted his head.
"She just returned from a mission," Sasuke frowned.
The two searched the entire Uchiha residence—living room, kitchen, corridor, training rooms—but found nothing.
"…She's really not here?" Sasuke muttered.
Naruto suddenly raised a finger.
"Wait! There's one place left!"
"…Where?"
Naruto pointed dramatically.
"The bathhouse!"
"..."
Sasuke paused.
Then nodded slowly.
"…Yeah."
But immediately he frowned again.
"How are we supposed to confirm that?"
Naruto grinned.
"Tsk tsk, of course not directly!"
Sasuke immediately looked suspicious.
"What are you planning?"
Naruto leaned in confidently.
"We just listen. Ninjas have better hearing than normal people, right? If she's inside, there'll be sound."
Sasuke froze.
"…That actually makes sense."
The two approached the bathhouse carefully.
Just as they were about to decide via rock-paper-scissors who would "listen," footsteps echoed from inside.
Clear.
Deliberate.
Not hiding at all.
A few seconds later, Chinatsu emerged from the bathhouse completely composed, wearing a clean yukata, expression calm and unreadable.
Both boys froze instantly.
"…My sister's aura changed again," Naruto whispered.
"…It wasn't like this yesterday," Sasuke added, visibly confused.
He stared at her eyes instinctively.
Something felt different… not fully active Sharingan, but something deeper.
Before he could ask, Chinatsu placed a hand on both their heads simultaneously.
"Don't think too much."
Her voice was calm.
"The Mangekyō Sharingan is not something Sasuke should understand right now."
Especially when you only have a one-tomoe Sharingan…
JOIN MY PATREON TO READ ADVANCE 30+ CHAPTERS
Patreon.com/Kora_1