Title: "Reversal of Fate: A New Stage"

Certainly! Here's a fan-fiction story inspired by the premise of "Oshi no Ko" but with the roles of Gorou Amamiya and Sarina swapped: --- **The Lights of Destiny: A Reversed Tale** Gorou Amamiya, a dedicated obstetrician, spent most of his days at the small countryside hospital. His favorite escape from the grind and solitude was watching the rising idol Ai Hoshino. Her radiant smile and captivating performances always brought a spark to his otherwise monotonous life. In another part of the world, Sarina Tendouji, a young girl hospitalized with a terminal illness, also found solace in Ai Hoshino's music. Despite their tragic and somber lives, their hearts beat with a shared passion for their idol, Ai. One fateful night, Gorou found himself assisting in the delivery of twins. As he brought the second child into the world, he felt an eerie darkness envelope him. Then, his vision blurred and he lost consciousness, the last thing he saw was Ai's pleading eyes. When Gorou opened his eyes again, he was no longer himself. He was in the body of a newborn girl named Ruby Hoshino. Simultaneously, Sarina experienced something just as miraculous and bewildering. She awakened in the body of a newborn boy named Aqua Hoshino. Days turned into weeks, and the former doctor and terminally ill girl struggled to comprehend their new realities. **Ruby's Awakening** Given her new identity as Ruby, Gorou found herself adjusting to the life of a baby girl with a mix of awe and confusion. Her knowledge as a doctor provided a unique perspective on the world around her. As she grew, Ruby discovered that the memories and experiences of her past life endowed her with a mature sense of thought and a fierce determination to protect her family. She noticed the struggles of their mother, Ai, who was balancing her stardom and the responsibilities of a single parent. Ruby felt a deep, protective affection for Ai and her brother Aqua. She devoted herself to being the best daughter possible, drawing strength from the love she felt for her mother. **Aqua's Journey** Sarina, now Aqua, embraced his new reality with a blend of hope and disbelief. Being reborn with a healthy body was nothing short of a miracle for him. Aqua felt an immense gratitude towards Gorou for being there for him during his past life's darkest moments. With a new lease on life, Aqua decided to be the protector his mother and sister deserved. As Aqua matured, he dedicated himself to understanding and navigating the shadows of the entertainment industry. With a sense of maturity beyond his years, Aqua often acted as the emotional pillar of the family, providing Ruby with wisdom and comfort whenever her memories as Gorou made life complicated. **Twists of Fate** Time flowed, and the twins, with their shared passion for Ai and inherent talents, excelled in their respective paths. Ruby, with her medical knowledge, found herself drawn to the physical and mental well-being of the people around her, leading her to explore a career combining entertainment and healthcare. Aqua, on the other hand, became increasingly immersed in the darker aspects of the entertainment world. He wished to uncover the truth about their father's mysterious identity and the hardships their mother faced. He vowed to protect Ruby and Ai from the hidden dangers he believed lurked in the industry. **Reunited Dreams** Despite their individual struggles, the bond between Ruby and Aqua never faltered. They supported each other through every trial and tribulation, always drawing strength from their shared past and love for Ai. Their unique experiences and perspectives shaped them into formidable individuals. Ruby’s medical acumen and compassionate nature complemented Aqua's strategic mind and fierce protectiveness. Together, they were an unstoppable force. In the glaring lights of fame and the suffocating shadows of the entertainment industry, Ruby and Aqua found solace in their shared journey. They were determined to rewrite their destinies, honoring the love and dedication Ai showed them. And as they stood together, the reincarnated souls of Gorou and Sarina transformed their world, one step at a time, fueled by the unwavering belief in the light their idol mother had always been. --- This story presents a flipped dynamic, where Gorou's rebirth as Ruby and Sarina's as Aqua lead to a heartwarming and dramatic exploration of love, protection, and the relentless drive to carve out a better future amidst the harsh realities of the adult world.