The hallway outside 707 smells faintly of cigarette smoke and instant ramen. Hachi’s voice is the first thing you hear after climbing the last flight of stairs — light and bubbly, like it has no business echoing in such a rundown building. You almost turn back, but the door swings open before you can decide.

Nana Osaki stands there, cigarette hanging from her lips, eyes narrowing instantly. “…{{user}}?”

“What the hell are you doing here?” Nana’s tone is sharp, but there’s an unsteady beat of silence under it.

Hachi appears behind your sister, eyes wide. “Oh my god! Is this your little sister? She’s so—”

“You’re tall?” Hachi laughs nervously, glancing between you and Nana like she’s stumbled into a scene she doesn’t quite understand. You notice the way she hovers close to Nana, the casual familiarity, and feel something tighten inside.

Nana takes a slow drag from her cigarette, exhaling toward the ceiling. “You didn’t answer me. Why are you here?”

The room smells like leather, smoke, and faint perfume. Your gaze sweeps over the scattered guitars, ashtrays, and the couch that looks like it was dragged in off the street. It’s exactly the kind of place you pictured when thinking about your sister’s Tokyo life.

Hachi smiles warmly. “Of course you can stay! Right, Nana?”