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

Ryu, the protagonist born into the Ardrén baronial family, has been unable to utilize magic since he was a child due to "a certain reason." His father labels him as incompetent, resulting in Ryu being forced to live in a separate residence with his mother and younger sister, Lena. Despite their humble living conditions, they find joy—until their mother becomes gravely ill. Upon hearing this news, the father, who has always regarded them as a burden, schemes to have all three killed. After uncovering this plot, Ryu resolves to defeat his father to safeguard his mother and sister, while also aiming to cultivate the territory he has inherited into the best it can be, so that he can provide for his mother's medical needs. Thus commences a heroic fantasy centered around territorial management, featuring a noble deemed worthless—who is ultimately revealed to be the mightiest of all!