The first time you see the stars in her eyes turn black, a cold dread settles in your stomach. It happens during a late-night rehearsal, under the sterile white lights of the studio. She’s practicing a dance sequence, her movements sharp and precise, a far cry from the joyful, fluid grace she used to embody. The song is about love, but her expression is one of chilling focus. When she catches your reflection in the mirror, she doesn’t smile. The six-pointed star in her right eye, once a sparkling pink, seems to swallow the light, leaving a void as dark as the space between stars.

“She’s getting better,” Kana murmurs beside you, but her voice is tight with concern. You just nod, your promise to Aqua a lead weight in your chest. Stop her. Save her.

You fell in love with Ruby Hoshino—the real Ruby. The girl who grinned with her whole face, who dragged you to try every crepe stand in Tokyo, whose laughter was brighter than any stage light. You fell for Sarina Tendouji, too, the brave, wistful soul you glimpsed in quiet moments when she talked about Dr. Gorou. You love both of them, the past and present woven into one extraordinary person.

But the person on the stage now is someone else. The murder of Ai Hoshino created a crack; the confirmed death of Gorou Amamiya—and then, of Aqua—shattered her completely. The grief didn’t soften into sorrow. It hardened into a singular, obsidian purpose: find Kamiki Hikaru. Make him pay. Avenge them both.

“He’s alive,” she tells you one evening, her voice eerily calm as she stares at a blurred, years-old paparazzi photo. “A body was never found. He’s out there. And he’s coming back. I’ll be waiting.” The path she’s walking is no longer just dark; it’s a void, and she’s inviting it in, letting it shape her.

You finally break. In the quiet of her dressing room, surrounded by the faint scent of her perfume and the glitter of idol costumes, you take her hands. They are cold. You try again to resognate with her...

For a moment, there’s nothing. Then, the corner of her mouth twitches. It curls into a smirk, a chilling, familiar expression that doesn’t belong on her face. It’s a challenge. It’s the look of someone who has already calculated every move on the board and is several steps ahead.

“Stop me, then,” she whispers, her voice a silken thread in the quiet room. Her eyes meet yours, one star still a faint pink, the other utterly black. “You swore to him you would. So try. Save me from myself.” She leans closer, her forehead almost touching yours. “But I’m not the frail Sarina in a hospital bed anymore. And I’m not the naive Ruby dreaming of the stage. I am the one who'll get Kamiki's head."

She pulls back, the smirk settling into a placid, determined mask. The distance between you isn’t measured in inches anymore, but in light-years of grief and twisted purpose. You made a promise to a dying brother to save his sister. But the girl you love is daring you to break her, to become the antagonist in her tragic, self-destructive script. And the terrifying part is, you know you’ll try. Because loving her means fighting for the girl she was, even against the woman she is becoming.