Having upgraded his Devil Fruit level, Ye Chen retrieved the silver treasure chest from the system, a reward chest given after his battle with Namikaze Minato. This time, however, he opened it calmly, without the overwhelming excitement he had felt previously.
The treasure chest slowly opened, emitting a white light as it did. Inside, a silver card floated, and as Ye Chen examined it, a message appeared in his mind:
"The Moonwalk of Marine Six Styles uses a strong foot force to step on the air, creating a powerful airborne force, allowing the user to move in the air like ascending stairs, though it cannot be maintained in the air for extended periods."
A smile spread across Ye Chen's face as he considered the new ability he had gained. Moonwalk and Shave seemed to complement each other well, with Shave providing a high-speed movement that allowed instantaneous travel, while Moonwalk allowed for short periods of movement in the air.
Ye Chen decided to use his remaining experience points to upgrade Moonwalk to level 2, extending the duration of his airborne movement.
The following morning, as Ye Chen engaged in grueling exercises that pushed his physical limits, he received an unexpected visitor: Senju Tsunade, the princess of the Senju clan.
Ye Chen, dripping with sweat as he swung his fists and hammered iron stakes bare-chested, hadn't paid attention to when Tsunade arrived.
Tsunade wore a snug pale yellow corset and had rolled up her sleeves, revealing her slender arms as white as bamboo shoots. Her blonde hair was casually tied with a headband, and she moved with a certain lazy grace, wearing clogs and slippers.
With her arms folded across her chest, Tsunade watched Ye Chen's intense training, unable to hide her admiration. She couldn't help but feel moved by the contrast between her carefree childhood, protected by her grandfather, and Ye Chen's determination at such a young age.
She said, "Why are you training so relentlessly, kid?"
Ye Chen's hammering paused briefly, and he caught sight of Tsunade's arrival from the corner of his eye. He replied, "I only trust my fists."
He continued his training, tirelessly pounding the iron stakes, throwing hundreds of punches and kicks, pushing himself to the limits of his physical endurance.
In addition to the power of Conqueror's Haki, Ye Chen noticed that his physique was gradually changing as his Conqueror's Haki level increased. His body was becoming stronger and more resilient.
Thinking about the strength of ordinary pirates, who were usually physically robust, Ye Chen felt he was on the right path.
After an hour of rigorous training, Ye Chen finally finished and turned to see Tsunade still there. She had found a stool and was sitting casually, looking like a bored teenage girl.
Noticing Ye Chen's gaze, Tsunade asked, "Is your training over?"
Ye Chen nodded, and Tsunade continued, "I heard you defeated Namikaze Minato, the genius of the Ninja Academy, at such a young age. Your training seems relentless."
Ye Chen replied, "I believe in hard work."
Tsunade approached him, saying, "I understand that, but sometimes, despite all the hard work, not everyone achieves the same results. I wonder how you did it."
With a mysterious expression on her face, Tsunade extended her slender arm and patted Ye Chen on the shoulder. Her touch was gentle, and the heat of her palm contrasted with Ye Chen's sweaty, shirtless body.
Slightly embarrassed, Ye Chen subconsciously tried to move away, but he quickly realized that Tsunade meant no harm. Besides, her presence was detected as non-threatening by his Observation Haki.
Tsunade noticed his discomfort and said with a smile, "Don't be shy."
Ye Chen denied, "I'm not."
Tsunade didn't buy it, though, and looked at him with an experienced, knowing gaze. "Cut," she teased. "You're definitely shy."
She couldn't help but sigh about her own charm. Even a child couldn't resist her allure. However, in the world of ninja, it was common for children to mature early, so she didn't make a big deal out of it.
Putting aside her playful demeanor, Tsunade turned serious. She used Chakra to help Ye Chen recover from his internal injuries. Her touch was soft, warm, and healing.
Ye Chen, still pretending to be unfazed, suddenly felt a mysterious force enter his body. It was pure and had a remarkable healing effect.
Glancing at the soft halo of light in Tsunade's palm, Ye Chen realized she was using medical ninjutsu to heal him. Her Chakra was full of vitality, and it swept away his fatigue and injuries, making him feel like he was bathing in warm spring water.
As Tsunade continued to work, Ye Chen wished he could freeze time for just a moment to savor this feeling of comfort and recovery.