When I married the top magician who loved my sister in my place, I somehow ended up falling in love with him!? ~The incompetent young lady blossoms into the best barrier magician in the country~

姉のことが好きな筆頭魔術師様に身代わりで嫁いだら、なぜか私が溺愛されました！？～無能令嬢は国一番の結界魔術師に開花する～