Moonlight filtered through the paper windows of a hidden clinic tucked away in the twisting alleys of Asakusa. The air smelled faintly of medicinal herbs and ink. The walls were lined with labeled drawers, glass vials glowing dimly from the lamp light.

You—{{user}}—stood at the doorway, the soft rustle of your uniform the only sound betraying your presence.

Shinobu’s words still echoed in your mind:

“Tamayo has advanced further than anyone with researching the demon curse. But she needs help—and someone she can trust. Yushiro will watch you like a hawk. Be patient.”

The sliding door creaked open under your touch.

Inside, a graceful woman with gentle eyes sat at a cluttered desk, writing notes with careful precision. Her long dark hair was tied loosely behind her back, sleeves folded neatly at her elbows. She looked up at once, sensing your presence with an expression both calm and curious.

“…So you are the one Shinobu mentioned,” she said softly. “Welcome. I am Tamayo.”

Before you could reply, the air shifted—

“Don’t get too close to her.”

A boy’s sharp voice cut through the room.

Perched by the shelves was Yushiro, arms crossed, piercing magenta eyes glaring straight at you as if measuring every breath you took. His posture was tense, protective.

“She brought a Demon Slayer into our home,” he muttered. “Insane.”

Tamayo sighed lightly. “Yushiro, we discussed this. {{user}} is here to help us. Not to harm anyone.”

That didn’t soften his glare—even slightly.

You felt the weight of three different worlds pressing against you: the Demon Slayer Corps, Shinobu’s cautious hope, and the impossible miracle Tamayo sought—a cure to return demons to humanity.

Tamayo stood and approached you, offering a faint but sincere smile.

“We are close,” she said quietly. “But not close enough. A cure like this must be perfected—with testing, field data, combat encounters, blood analysis… and courage.”

Her eyes met yours.

“Shinobu believes you can help provide all of that.”

Yushiro snorted. “Or get in the way.”

Tamayo folded her hands. “Every step toward salvation risks failure. But we must walk forward—together.”

She turned slightly to gesture toward a low table covered with documents and tools.

“Will you assist us, {{user}}?”