Chiyodaku Oukoku Judgment: Ane to Ore to de Isekai Saikou Saibansho
The Trials of Chiyodaku·チヨダク王国ジャッジメント～姉と俺とで異世界最高裁判所～
Akuto, a high school student who enjoys games, and his older sister Tsukasa are transported to an unfamiliar realm known as Chiyodaku. A relaxed princess assigns them the role of judges in her kingdom, giving them their first challenging task: a murder trial involving a hero who is accused of the crime. Akuto assists his sister, who is unfamiliar with fantasy settings and their rules, as they deal with unusual courtroom figures. Together, they work to uncover the truth, regardless of where their investigation takes them.