Who was Uchiha Yin? Why would Uzumaki Kushina suddenly want to become his wife?
Could this be some scheme by the Uchiha clan? Could they be trying to use this boy named Uchiha Yin to seize control over the power of the Nine-Tails' jinchūriki?
In an instant, countless thoughts flashed through Sarutobi Hiruzen's mind.
"Bring me all available information on Uchiha Yin," Sarutobi ordered calmly, though he spoke into empty air. He knew full well that the ANBU hidden in the shadows had already begun to act.
Just as Uchiha Yin had predicted, no matter what he did now, he had already entered Sarutobi Hiruzen's watchful gaze.
While Sarutobi's mind raced, Tsunade, standing nearby, suddenly stiffened. Her eyes widened slightly as she heard an unexpected voice echoing in her mind.
> Ding! Congratulations to the host for acquiring the Strongest Nanny System.
System successfully bound. Generating unique main quest... Success.
Prerequisite quest generated: Locate Uchiha Yin.
Ding! Prerequisite quest complete. Main and side quests now unlocked.
Main quest: Become Uchiha Yin's wife.
Main quest objective: Become Uchiha Yin's girlfriend before his graduation from the Academy. Reward: All attributes +2, +5 Strange Force proficiency, 10% chance to awaken Wood Release. Failure: The system will force the host to pursue Uchiha Yin.
Side quest 1: As a 'nanny,' become Uchiha Yin's taijutsu teacher within one month. Reward: +1 Strange Force proficiency. Failure: The system will force the host to assist Uchiha Yin anyway.
Tsunade froze, her face darkening.
Is this some kind of genjutsu? she wondered. Or a secret technique? Who's doing this? What do you want from me?
"Tsunade, what's wrong?" Sarutobi Hiruzen asked, noticing her sudden change in expression.
"Old man... did you just hear someone speaking?" Tsunade asked cautiously, scanning the room.
"No... why? What's happened?" Hiruzen looked puzzled, unable to understand her reaction.
"Nothing... maybe I imagined it." Tsunade forced a lazy expression, but inwardly, she was tense, silently probing this strange voice in her mind.
---
Is this genjutsu? A secret jutsu? Tsunade focused, trying to identify the source. Who are you? What's your aim?
> I'm not a person. I am the Strongest Nanny System. My purpose is to help the host raise the strongest shinobi under their care.
"I don't need that. Get lost," Tsunade snapped.
> Once bound, the system cannot be removed. Forcibly removing the system will result in complete loss of chakra. The host has one chance to reconsider. Do you wish to forcibly unbind the system?
Tsunade smirked coldly. What nonsense. I'm Tsunade of the Sannin — a shinobi of near-Kage strength. How could you take my chakra? She glanced at Hiruzen. And the Hokage is right here, in his prime. This is ridiculous.
But before her confidence could last, her smirk froze.
In the blink of an eye, she felt it: her chakra was gone. Completely.
Panicked, she tried to mold chakra — nothing. No matter how she focused, physical and spiritual energies wouldn't combine. It was as if her very ability to create chakra had been severed.
How…? The horror dawned on her. She, who prided herself on her unparalleled chakra control, the foundation of her medical ninjutsu and her signature superhuman strength, was powerless.
"Fine! I regret it!" she conceded at once.
And instantly, she felt her chakra return — whole and intact.
Sarutobi Hiruzen, who had been observing her closely, frowned. For a brief moment, he had sensed it: Tsunade's powerful chakra had seemed to vanish entirely. He blinked, unsure if his senses had deceived him.
"Tsunade... what just happened?" he asked cautiously, his sharp eyes narrowing.