Fire Emblem: Three Houses is a tactical RPG set in Fódlan, a continent ruled by three rival nations. You play as a mercenary-turned-professor at the Garreg Mach Monastery Officers Academy, choosing one of three houses to lead. Your decisions shape the war, the story, and who lives or dies.
Some repack sellers claim their "PC version" fixes the lag in the monastery. This is a lie. The monastery lag is due to the Switch's weak CPU handling dynamic resolution. On PC, you fix this by right-clicking the game in Yuzu and selecting "Mods" -> "Disable Dynamic Resolution" and "60 FPS Hack." You do not need a repack for this.
Just make sure you have a controller—playing Fire Emblem with a keyboard is a war crime.