Forced to Become an Experimental Subject

Extracting chakra meant drawing it from one's cells, after all. Whenever he reached his limit, he had to wait for his cells to recover.

Fortunately, Shangguan Yue's bloodline was unusual, so constantly extracting chakra did little damage to his body. Compared to what he gained, it was worth it.

Even in the Cultivation Room, Shadow Clones had a special mechanism: each one took half his chakra when it was created. He could only self-destruct a few times a day, or it would affect his development.

Shangguan Yue looked at the newly added Shinra Tensei on his panel and shook his head.

"This system keeps giving me abilities I can't use yet. Oh well, something's better than nothing. The God Slayer Art is almost finished, too.

"But where am I supposed to get the energy for the next stage of the deduction? I could use a challenge attempt for this first reward, but that won't work next time. It doesn't even give me a hint."

"Knock, knock, knock. Yue-chan, are you up?"

"Don't call me 'chan.' I'm up. Just a second—I'm getting dressed."

"Bang!"

The door swung open from the outside. Tsunade paid no attention to Shangguan Yue's attempt to cover himself and walked right up to him.

"Honestly, you're such a little man. It's not like I haven't seen you before. Why are you still embarrassed? This is the last day of your half-month treatment. Open wide and take your medicine."

Shangguan Yue obediently opened his mouth and swallowed Tsunade's medicine without complaint. He had complete faith in his body.

Seeing him finish the last bottle, Tsunade looked excited.

"His body's so freakish. I added five times the usual amount. It should be fine, right? By the time he's finished this bottle, he'll have taken the equivalent of a year's worth for an ordinary person.

"Now we just have to see if Yue's body can begin its first sexual development. Then that thing will be usable, and the Senju Clan's hopes will..."

Tsunade's eyes lit up as she glanced down. She had insisted that Shangguan Yue sleep naked, claiming it would help her observe the precise details of his development.

And so, under Tsunade's long-awaited and eager watch, the bud began to sprout, stretching its tender little body.

It began to grow sturdily. "Gulp." Hearing Tsunade swallow, Shangguan Yue felt a sense of foreboding.

"Tsunade, calm down! We haven't even checked for problems yet. Don't get ahead of yourself. If it breaks, it'll be gone for good."

"Gulp. Hah... All right, I'll listen."

Tsunade held back her excitement, drew some blood, and examined him herself. Only after a while did she finally stop.

"By the way, you can enroll tomorrow. Get ready today. There's an entrance exam tomorrow."

"Got it. Go take care of your own stuff."

Tsunade took the freshly collected experimental material and used the Body Flicker Technique several times to reach her lab, where she placed it under a microscope.

"Woohoo! It's finally done. There are little tadpoles, though it looks like they still need time to grow. They're not strong enough yet."

Shangguan Yue couldn't be bothered to pay attention to Tsunade. For the past half-month, aside from his daily workouts, beating up the little kids, and entering the cultivation space, he'd been subjected to every kind of experiment by Tsunade.

Still, he could feel that a certain part of his body was developing faster, and he felt no discomfort. You really couldn't beat a supernatural world.

Everything was so unreasonable, yet somehow perfectly reasonable. Just thinking about Tsunade's expression at the beginning made Shangguan Yue shudder.

He remembered the day Tsunade had pinned him to the examination table and run all kinds of tests.

"Yue, your body is incredibly strong—so strong it's freakish. Even I, the Senju princess, can't match your ability to heal.

"It's enough to make me despair. But because you're so strong, I think my proposal might actually work."

"What are you planning to do? Could it affect my body?"

Shangguan Yue wanted it, too. After all, he'd been a virgin even before being reborn, and having to start all over again in this life was driving him crazy.

But he was still worried it might leave him with lasting problems. He was only five, after all. There was something unsettling about making him develop ahead of time.

Tsunade wore a white lab coat. Her magnificent chest and the youthful innocence unique to a girl gave her a striking beauty, while the fervor in her eyes—and the bloodstained Chakra Blade in her hand—lent her an alluring air.

But her cherry-red lips said things that made Shangguan Yue's legs go weak.

"Don't worry. Of course it won't. After inheriting my Granduncle's body, your healing ability is even more impressive than the Slug Sage's clones. Your recovery is incredible.

"So now I can increase the dosage. Don't worry, I'll do it gradually. Let's start with five times the usual amount... No, better make it twice. I don't want to make you burst.

"Haha! Once it works, Yue, you'll be able to... Then we can give the Senju Clan hope again.

"Do your best, Yue! You can do it!"

Shangguan Yue's mouth twitched as he watched Tsunade set down the blood sample she had just finished examining and turn back to adjust the medicine.

"I never thought that not long after getting my cheat, someone would want to use me as a stud. I really...

"But if it's Tsunade, I guess it's not out of the question. Wakaka! A bloody battle!"

"Huh? Yue, I didn't know you were that kind of person!"

"? Chuuni, don't listen to things you shouldn't, and don't say things you shouldn't. I'm a respectable person, a pure-hearted little boy."

"Ugh! Spare me. I don't believe you. But it's probably for the best. Your bloodline makes it hard for you to have children.

"So you really should give it your all. But you're only five. Can you even manage it?"

"Please, I'm not five! My actual age is already thirty!

"Hmph. Chuuni, don't pry into adults' business. You'll find out whether I can manage it. But don't worry, I'll keep you hidden."

"Whatever. It's not like I want to watch. Mortals ruled by desire can never reach the realm of the gods."

"What do you know? Food and sex are basic human needs. A life without desire is a life wasted."

"..."

While Shangguan Yue and the Chuunibyou God argued over whether divinity needed to exist, Tsunade stared at the medicine she had concocted and swallowed.

She walked over to Shangguan Yue. "Yue, stop daydreaming. Here, drink this."

Shangguan Yue's verbal sparring with the Chuunibyou God was interrupted. Seeing that the god was still rambling, he said, "Honestly, I'm giving you a five-minute silence package. Go reflect on what you've done. You've forgotten who's boss."

The Chuunibyou God's loud protests instantly fell silent. Shangguan Yue stared at the green, steaming, bubbling concoction in Tsunade's hand.

"Gulp. Tsunade, is that medicine?"

"Obviously it's medicine. Drink it!"

"I... Mmph! Gulp."

Shangguan Yue's face was full of resistance, but Tsunade simply grabbed him and forcefully poured it down his throat.

"Mmph! Help! I don't want to drink it!"

"Go ahead and scream. Even if you scream your throat raw, nobody's coming to save you!"

The medicine was gone in no time. Shangguan Yue leaned against the bed, trying to throw up, but Tsunade covered his mouth with Heaven-Covering Hand.

Shangguan Yue gave Tsunade a resentful look. She smiled sheepishly, but her hands never stopped moving.

Soon, the medicine took effect. Shangguan Yue felt his whole body heat up, turning into a furnace.

Gradually, the furnace shrank and settled around his lower abdomen and bladder. "Oh! It's working."

Before Shangguan Yue could react, Tsunade tossed him onto the bed and handled him like a porcelain doll, moving him around as she pleased.

Tsunade never stopped recording her observations, while Shangguan Yue was pinned down and rubbed into the floor with one hand.

"Great, it's gotten a little longer... just a little."