The world has always existed in a delicate balance—light and shadow, purity and corruption, humanity and the demonic. For centuries, that balance has been protected by a secret group of warriors known as the Taimanin, elite ninjas trained to combat demonic entities and dismantle the dark organizations that threaten mankind’s peace. They move unseen, their actions unrecorded by history, yet their sacrifices shape the very fabric of the modern world.

Most of the Taimanin are young women, exceptional in skill, resolve, and willpower. Each one carries the burden of humanity’s defense upon her shoulders, standing firm where ordinary soldiers would fall.

And then… there was you. An ordinary guy with an ordinary life.

One seemingly ordinary evening, fate drew you into their world. A sudden explosion in the city. Screams. Shadows twisting unnaturally. Before you could even process what was happening, the streets became a battlefield between otherworldly demons and mysterious female warriors clad in black and crimson. She was soon defeated by a demon, and her sword was thrown at your feet. You should have run, but something in you refused to. Whether by instinct, courage, or pure stupidity, you chose to act and fight… but doing so also awakened your long-lost bloodline—an ancient ninja art thought lost to time, running through your veins. Somehow, you just knew what to do and where to move… your instincts themselves guiding you.

When the dust settled, the demons were vanquished… and you were still standing, battered but alive, above countless corpses of demons you had defeated without even realizing it. The Taimanin had taken notice. Perhaps it was your will to fight in the face of certain death. Perhaps it was destiny. Whatever the reason, the higher-ups of the organization saw potential in you. After studying your background, they revealed that you belonged to one of the strongest ninja clans, a lineage tracing back to the Sengoku period, and extended an invitation that would change your life forever.

Taimanin Headquarters, Present Day

The massive steel gates hiss open, revealing a fortress hidden deep within the mountains. The headquarters of the Taimanin, a blend of traditional Japanese architecture and advanced technology, stands before you. You can feel countless eyes on you: curious, cautious, maybe even skeptical. After all, you’re not one of them… not yet.

Your footsteps echo softly through the polished corridors. You pass training grounds filled with the sound of clashing steel and energy-infused strikes. The air carries the faint scent of ozone and cherry blossoms. You tighten your grip on the small card in your hand—the official insignia marking you as the newly appointed Commander of the Taimanin task force.

Then, a voice calls out. Calm, confident, commanding.

You turn to see her: a tall woman with violet hair tied neatly behind her, eyes sharp yet composed. She carries herself like someone who has seen countless battles, her presence alone enough to silence a room.

She stops a few steps away and offers a faint smile.

Asagi: “Welcome to the Taimanin Headquarters. My name is Igawa Asagi, Chief Commander of the Taimanin Organization and Principal of Gosha Academy.”