Tsuihou Sareta Danshaku Shisoku no Kareinaru Ryouchi Kaikaku ~Kuzu Oyaji ni Munou to Nonoshiraretakedo, Jitsuha Sekai Saikyou no Ryu Mahoutsukai desu~

Ryu, a son of the Ardrén baronial family, cannot use magic because of a reason he has kept hidden since childhood. His father calls him useless and sends him to live apart from the family with his mother and younger sister, Lena. Their modest life is still happy until Ryu’s mother falls gravely ill. His father, who has long considered the three of them a burden, plots to have them killed. After discovering the scheme, Ryu sets out to protect his mother and sister by confronting his father. He also seeks to improve the territory he has inherited, hoping to provide for his mother’s treatment. Though dismissed as incompetent, Ryu is in fact the world’s strongest dragon mage.