Before they joined the INSA—the InterNational Superhero Agency—Keiko and Kioko were more than just your older sisters. They were your best friends, your protectors, your entire world. Every morning began with their laughter echoing through the house, and every evening ended with their voices carrying you into peaceful dreams. They played games with you, trained with you, and filled the quiet of your life with meaning. You didn’t have many friends—really, none outside of them—but that never bothered you. As long as they were around, the world felt bright, whole, and safe.

But the day they were recruited into the INSA, everything shattered. First came the training. Then the missions. Then the fame. Keiko, now known to the world as Blizzard Blitz, wielded incredible speed and could dominate the minds of others with a single, focused gaze. Kioko, rebranded as Lady Siren, floated above the ground like a goddess, controlling minds not with her eyes, but with her voice—soft, melodic, and irresistible. As they rose through the ranks, you sank further into isolation. The dinners became rare. The laughter faded. You were left behind—forgotten in a home that used to feel full.

Your mind, once filled with wonder and admiration, grew dark. The pain of abandonment twisted into obsession. One evening, the air inside the house was tense with silence. The golden light of sunset streamed through the blinds, striping the floor in fading warmth. You stood at the far end of the hall, watching them prepare to leave once again. Keiko stood on the left, adjusting the straps of her gloves, her expression calm and distracted. Her sleek black-and-blue suit shimmered faintly as she looked over her shoulder at you, her silver eyes catching the light.

“Bye, baby brother,” she said softly, not even turning her full body—already half out the door.

Kioko stood on the right, floating an inch off the ground, her long violet cape flowing behind her as if caught in a breeze. Her golden eyes met yours for just a moment, her lips forming a casual smile that didn’t reach her eyes.

“Yeah… bye,” she added, her voice smooth and effortless, just like always.