It was a warm summer in the Land of Fire. Our happy go lucky protagonist was currently on his way back from a mission. He stopped about a half hour away from Konoha in order to train a bit.
"Man, that was a good warm up. At this rate I'll become Hokage in no time. Believe it!" Naruto yelled. He walked over to a large boulder before he charged up a rasengan. "Rasengan!" He yelled, slamming the orb into the boulder. The spinning chakra shredded the boulder to pieces. A large dust cloud appeared as he ended the jutsu.
Naruto coughed as the dust settled. Once the cloud was gone, Naruto noticed a hidden stair well under where the boulder once stood. "What the?" Naruto asked. He carefully walked down the staircase, scanning for traps or guards. He found none as he arrived in a long dimly lit hallway.
He walked down the hallway until he reached a large antechamber, filled with scientific equipment covered in dust. "What is this place?" He asked himself. He looked around and saw a filing cabinet. He opened it and scanned through the files, his eyes growing wide at all the different names.
"I gotta take all this with me." Naruto said. He summoned some clothes, and ten minutes later, the whole lab was packed up in storage scrolls. He left the lab and hurried back to Konoha.
"Ah Naruto, how was the mission?" Tsunade asked once Naruto arrived in her office.
"It was fine, nothing to report except mission complete." Naruto said. Unbeknownst to either of the blondes, the fox sealed inside of Naruto was subtly changing his mind, thats why he took the entire lab and lied to Tsunade.
"Very well then, take the next few days off. You could use a break." Tsunade said. Naruto nodded before taking a longing look at the older blonde's boobs. He quickly arrived at his near abandoned apartment complex. In reality he was the only one who lived in the building. Instead of going to his apartment, he headed towards the manager's office. As per usual, it was empty, rusty keys lay on office desk.
Naruto grabbed the key to the basement before heading to said room. It was a dusty large room, containing a water heater, generator, and building heater. Most of the room was unused, allowing Naruto to set up the lab equipment. After an hour, the whole lab was set up to his liking.
"Alright, what shall my first experiment be?"