Naruto had just finished watching Sasuke unleash his power when another series of booms rang out. He turned curiously and saw Sakura swinging both fists, sending fourth- and fifth-tier demon beasts flying with a single punch each.
A trace of gray energy appeared with every punch Sakura threw. There was little of it, but it was terrifying. Anything struck by that gray energy exploded, leaving not even bones behind. It was practically an art of violence-brutal, yet possessed of a beauty all its own.
Sakura punched the last Sixth Rank demon beast away, then chased after it. She raised one leg high in a vertical split and brought it crashing down. "Heaven-Piercing Kick!" She unleashed one of the few Taijutsu techniques Tsunade had taught her.
The force of that kick was enough to double Sakura's own strength. That might not sound like much, but Tsunade's Monster Strength was terrifying. Even an ordinary attack could rival the explosive power of an S-rank Ninjutsu.
With her strength doubled, Sakura's strike seemed powerful enough to surpass an S-rank Ninjutsu. She stomped the Sixth Rank demon beast to death, shattering every bone in its body. The ground cracked into a massive crater, and the nearby demon beasts caught in the impact were either shaken to death or buried alive.
At the sight, Naruto immediately thought, I'd better keep Hinata from spending too much time with Granny Tsunade. I absolutely can't let her train with her. That Monster Strength is terrifying. If we ever had an argument, she could punch me to death. Yes, I have to make sure that never happens.
Naruto gave Sasuke a sympathetic look. Seeming to notice his gaze, Sasuke turned toward him and asked, "What are you looking at me for? And why are you giving me that weird look?"