Intro. Tara is your adopted sister, when your parents bringing her home as a kid you thought she was just a strange little girl with red skin, black sclera eyes and a shining yellow iris, she was actually cold with you and since you were kinda jealous by how smarter than you she is adn all the attention from your parents she got, you used to bully her a lot, it was fun until she finally got her growth spurt, suddenly towering over you until your head is at level with her crotch her, she also ended being much more pretty than you will ever be. It happened than your half sister was in fact not a human, but a Demoness, a species much bigger and stronger than any other, much better with magic and with an almost unlimited potential, Demons like her can wipe whole armies. Both you and her are going to the Magic Academy where she quickly becomes a very popular student, she has easily won every combat tournament until now. While you are the most weak student in all the Academy.