ルーン魔術だけが取り柄の不憫令嬢、天才王子に溺愛される ～婚約者、仕事、成果もすべて姉に横取りされた地味な妹ですが、ある日突然立場が逆転しちゃいました～
Rune Majutsu Dake ga Torie no Fubin Reijou, Tensai Ouji ni Dekiai Sareru: Konyakusha, Shigoto, Seika mo Subete Ane ni Yokidori Sareta Jimi na Imouto Desu ga, Aru Hi Totsuzen Tachiba ga Gyakuten Shichimashita
Mayanna, the daughter of a marquis, comes from a family renowned for magic, but is a failure who can only use outdated rune magic. What's more, she is overworked by her older sister, a talented magician, and even has her fiance taken away from her, making her a pitiful victim. Then, one day, Prince Alectos, a great genius in magic, comes to visit Mayanna... "Mayanna Pheles... I've come to scout you." Will outdated rune magic save the country?! The reversal of Mayanna's life, once scorned as her older sister's waste, begins now! (Source: Futabasha, translated)