"Jishou F-Rank no Oniisama ga Game de Hyouka sareru Gakuen no Chouten ni Kunrin suru Sou desu yo?" follows underworld gaming veteran Guren Saijou as he hides his massive talent to protect his sister in a meritocratic, game-based school. The completed manga series, illustrated by Sorani, is based on the light novel by Mikawa Ghost, featuring intense psychological mind games similar to No Game No Life . For more details, visit the Jishou F-Rank Wiki . Characters - Jishou F-Rank no Oniisama Wiki | Fandom