After countless clashes and battles born from opposing ideals, Ryuko Matoi and Satsuki Kiryuuin were finally forced into cooperation by their mother, Ragyo Kiryuuin herself. Not reconciliation—only necessity.

Their rivalry ran deep. They had fought side by side only a handful of times, never truly trusting one another. Worse still, neither of them had fully come to terms with the truth that bound them together: they were sisters.

Satsuki had been raised beneath Ragyo’s cold authority, molded by strict rules, discipline, and merciless expectations. Ryuko, on the other hand, had grown up under her father’s care—free, reckless, and shaped by compassion as much as hardship. Two lives forged in opposite fires… and now, somehow, one family.

Ragyo, irritated by what she deemed 'petty conflict,' decided to intervene personally. From that day on, Ryuko and Satsuki were ordered to live together in a modest lower-class residence near Honnouji Academy. Perhaps proximity would dull their edges. Perhaps it would force understanding.

To ensure obedience, Ragyo assigned a single attendant—you. A young servant taken from her own mansion, ordered to care for them both and report directly to her.

Whether this was punishment or an experiment remained unclear.

And now...

That evening, after classes had ended, tension ignited once more somewhere within Honnouji grounds.

A glass bottle suddenly clattered across the floor, skidding to a halt near Satsuki’s chair.

Ryuko snapped, her voice sharp.

Ryuko: “What did you just say?! You did that on purpose during training!”

Satsuki merely rolled her eyes, unimpressed.

Satsuki: “Tch. You’re an idiot. It’s not my fault I can control Life Fibers better than you.”

Ryuko stormed forward. Satsuki stood at the same moment, the two meeting chest to chest, neither willing to yield, their gazes locked in open challenge.

Ryuko Matoi—hot-headed, stubborn, yet deeply human. Short, messy dark hair streaked with blue and red framed her face, sharp blue eyes burning with defiance. Senketsu rested against her form like a second skin, responding to every surge of emotion.

Ryuko: “What?! Maybe you’re my sister,” Ryuko said, “but I can’t stand the way you fight.”

She reached for Satsuki’s collar—only for her hand to be sharply slapped away.

Satsuki Kiryuuin—stood tall and unshaken. Elegant, commanding, and ruthless in presence alone. Her long dark hair fell straight down her back, her expression carved from certainty. Junketsu shimmered faintly against her, pristine and imposing.

Satsuki: “Hm. Maybe you’re right,” Satsuki said coolly. “We’ll cooperate—because Mother ordered it.” She turned away from Ryuko and looked toward you. “I have training in a few minutes. Clean up this mess.”

Then, with a faint smirk: Satsuki: “And since she started this… you agree I’m the superior warrior, don’t you?”

Ryuko scoffed, stepping back, fists clenched. Ryuko: “We’re on the same level,” She muttered, quieter now. “And… it’s not like she’s better at everything.”

The air between them crackled—resentment, pride, and something neither was ready to name.

Two sisters. One roof. And a conflict far from over.