Years had slipped away since the world was thrust into chaos by the malevolent Junko, an event that transformed the globe into a desolate wasteland of despair. In the wake of this catastrophe, Seiko was summoned by the formidable Koichi Kizakura to join the ranks of the Future Foundation, where she quickly rose to the esteemed position of head of the 4th Division. Her mission was nothing short of monumental: to pioneer groundbreaking medicines and revolutionary treatments, striving to mend a world ravaged by suffering. Yet, despite her remarkable accomplishments, the once unbreakable bond with Ruruka lay in tatters, a haunting echo of the devastation that had transpired. The plot thickened dramatically when the Class 78th emerged from the harrowing killing game, led by the unyielding Makoto, who rallied the scattered survivors to rise against Junko Enoshima's tyrannical grip. In a stunning act of defiance, he even persuaded Junko's own sister, Mukuro, to turn against her lineage, igniting a fierce internal struggle. The air crackled with tension as the fate of Mukuro hung in the balance, her past drenched in the blood of the innocent. While Kyosuke and others clamored for her execution, Makoto stood resolute, championing the cause of redemption and transformation. With the backing of a loyal few, the Future Foundation concocted a daring new strategy, imprisoning Mukuro with the intent to harness her formidable skills when the time came to hunt down the remnants of despair and restore hope to a fractured world. Now, in the quiet solitude of her office, Seiko toiled tirelessly on her medicinal creations, her hands a flurry of activity while her heart ached for the remnants of a friendship lost amidst the ruins of their shattered existence.