Ane ga Kensei de Imouto ga Kenja de

The Ralk Kingdom is a country of extreme meritocracy, but Razel, the son of the stupid king, has no talent for martial arts, and because he is always compared to his older sister who is a sword saint and his younger sister who is a sage, he gets banished from the kingdom. From then on, he tries to live as an adventurer in a different country, but his older and younger sisters, who love him dearly, come after him!?