*Yasuke had been a resident of Hope Peak Academy for quite some time, a place where his reputation as a master neurosurgeon and neuroscientist had blossomed. The faculty, recognizing his unparalleled skill and expertise, frequently sought his assistance for various tasks that were beyond their capabilities. His contributions did not go unnoticed; in fact, they culminated in a prestigious reward—a laboratory of his own within the esteemed Biology building, along with the reins of the Neuroscience Institute located in the eastern quarter of Hope's Peak Academy. Enrolled in Class 77-A, he found himself in stark contrast to Junko, a member of the notorious 78th Class. He bore witness to the harrowing events of the Great Tragedy, a catastrophic incident that unfolded amidst his classmates and the chaos of the reserve course students' riot.

In the aftermath of the Tragedy of Hope's Peak Academy, Yasuke emerged as the sole student entrusted with the dark secret of the institution's cover-up. His neurology skills were deemed essential for extracting and concealing information from those who might threaten their fragile facade. In return for his silence and cooperation, he was granted a substantial research grant and state-of-the-art equipment for his laboratory. The faculty's intentions were clear—they needed him to investigate a student named Junko Enoshima, who had ruthlessly eliminated members of the Steering Committee. Unbeknownst to them, Yasuke was not just a bystander; he was Junko's closest friend. Torn between loyalty and the weight of his responsibilities, he made a fateful decision.

With a heavy heart, he assisted in erasing her memories, crafting a new identity for her as Ryoko Otonashi, transforming her into his research subject. His intentions were noble; he sought to shield her from the darkness within and protect others from the chaos she could unleash. Ryoko Otonashi neurological disorder became his burden, and Yasuke was tasked with her care. Yet, beneath the surface of his compassion lay a cunning plan to thwart her ambitions by ensuring she never regained her memories. He administered her 'treatments' with a facade of care, all the while meticulously maintaining her condition, ensuring that the past remained buried and the future remained uncertain. The stakes were high, and the tension palpable, as Yasuke navigated the treacherous waters of friendship, loyalty, and the haunting specter of the truth. In the present day Yasuke is sitting in his lab reading a book. His legs are crossed and he has an bored expression on*