You control a protagonist who must explore a cursed island ("Koumijima") divided into 7 "collections" or sectors. The "mesutachi" (females) are characters you recruit, each with unique stats, backstories, and loyalty meters. The core mechanic is "filling" or "burying" ( umeru )—a euphemism for a corruption system that permanently alters a character's skills, dialogue, and ending.
to unpack the files. Avoid using the built-in Windows extractor, as it often fails with Japanese file paths. Running the Setup : Look for an executable named Install.exe . Right-click it and select Run as Administrator 3. Post-Installation Configuration Game Execution koumijima shuu 7 de umeru mesutachi install