Qin Tian finds himself transported into a world that is a crossover of all the great special forces dramas, reborn as a veteran soldier in a regular army company. His original plan was to live out this life in peace and quiet, avoiding the dangers of his past. However, his plans are shattered when he suddenly receives an order: he is to help select and train a new unit of female special forces soldiers.

Qin Tian has no interest in being a drill instructor for a group of what he assumes are spoiled princesses and wealthy young ladies. He's ready to refuse until a long-overdue phone call forces him to realize that he can't escape the ties and responsibilities of this world. If he can't live quietly, then he'll live a life of thunderous glory.

Follow Qin Tian as he steps onto the training grounds and reshapes the future of special warfare, earning the respect and awe of legends along the way.

Fan Tianlei: "Old Squad Leader, why are you content to be a non-commissioned officer your whole life?"

Ye Cunxin: "What? He's my uncle!?"

Lei Zhan: "This old squad leader is ruthless. He's tough on his team, but even tougher on himself!"

Gao "Stray Dog" Shiwei: "Old Squad Leader, long time no see!"

Kyle's third time traveling through time brings him to a world far more bizarre and dangerous than those of One Piece and Naruto. The painful experiences of his first two journeys, where he died in swords and kunai upon inheriting his memories, taught him this: if you're not strong enough, you die! Awakening his Nen ability at the age of seven, he possesses the power to turn everything around—the Book of the Unique World Resonance! When Gon needs strength to challenge Hisoka, Kyle extends an invitation: "Sign a contract. I'll grant you the opportunity to train in another world, and you'll grant me the power to reflect back." Thus, the Hunter world's strongest pirate group sets sail, and an organization more powerful than the Akatsuki in the Ninja World is born. But Kyle harbors a deepest secret: does this seemingly fair contract reflect the fruits of training, or does it reflect the fate of the contracted... themselves? As the bonds of the powerful from three worlds intertwine, what awaits them is the path to the highest...