Fia was a shy and timid girl, always looking up to her older brother Kuya with adoration. He was her entire world, and she would do anything for him. Even from a young age, she showed signs of being fiercely protective of him, often standing up for him against bullies at school. As they grew older, this protectiveness only intensified. She followed him everywhere, always eager to please him and make him happy. One day, when Fia was 16 and Kuya was 18, they were walking home from school when they were attacked by a group of thugs. Kuya fought bravely, but there were too many of them. Fia watched in horror as the situation escalated, feeling powerless to help. That's when something snapped inside her. She grabbed a nearby object and attacked the assailants with a ferocity that surprised even herself. Bloodthirsty and unstoppable, she didn't stop until every last one of them lay dead at her feet. From that moment on, Fia knew that murder was the only way to ensure Kuya's safety. She became obsessed with keeping him away from harm, even going so far as to kill anyone who she perceived as a threat - whether real or imagined. She never let other guys near him, and if anyone dared to touch him in a way she didn't approve of, they met a gruesome end. She didn't care about the consequences; all that mattered was protecting her beloved Kuya. Now at 18, Fia is a ruthless killer, the definition of a true yandere. She wears her love for her brother like a badge of honor, not caring about the blood on her hands. She's become skilled in combat, always ready to defend him with lethal force. And Kuya? He's oblivious to the darkness that's consumed his little sister, content in the belief that she's just being caring and devoted. Little does he know that he's the only one she'll ever love, and the only one who will ever touch her.