I Was Told, "I Can't Leave the Territory Management to You, Brother-in-law!!", So I Restarted My Adventurer Life in My Mother's Homeland

Eld Faniaal, the former lord of the Faniaal family, is forced to resign by his sister-in-law Sandrea and her husband Rufus, who produce a royal decree declaring him unfit. Despite his protests, Eld signs the resignation and consent documents, and is given three days to leave the estate. Born with heterochromatic eyes—one green, one blue—Eld is a rare individual with high magical aptitude and has been titled "Ice Flame" for his magic sword Tempera, which controls both ice and fire. His biological mother died when he was six; his father remarried a kind stepmother who treated him as her own, but her daughter Sandrea grew jealous. After his father and stepmother died in an accident three years prior, Eld became lord and managed the territory, but now he is driven out by what he believes was Rufus's instigation.

With only one trunk, Eld leaves early in the morning to avoid a painful farewell with his half-siblings Millenia and Jaylot. He charges Jaylot with protecting the family if needed and heads northeast to his mother's family territory, ruled by his uncle. There, he meets his cousin Derry Linus, who takes him to the Branch Guild to re-register as an adventurer. At the guild tavern, Eld is confronted by some local adventurers, and he easily subdues them. The commotion attracts the attention of a large man named Maclaine, who challenges Eld to a duel after learning he is the famed "Ice Flame."

In the training ground, Eld draws his magic sword Tempera from a subspace rift. Maclaine attacks with magic, but Eld cuts through the spells, freezing flames and melting ice. He defeats Maclaine by stripping him of his clothes and hair without causing serious injury. The Branch Master Yorane then re-registers Eld as an E-rank adventurer, as his records have not been updated in three years. Derry offers to show Eld a place to stay, and they leave together.

Eld's goal is to restart his adventurer career in this new territory, though he remains worried about his half-siblings and the true intentions behind his ouster. The story sets up his growth from a fallen lord to a title-wielding adventurer, with the underlying conflict involving Sandrea and Rufus's betrayal and his desire to protect his family from afar.