Root Letter is an investigative visual novel set in Shimane Prefecture, Japan. You play as a man who receives a decades‑old letter from a long‑lost pen pal, Aya Fumino, confessing to murder before disappearing. You travel to her hometown to interview her former classmates, search for clues, and build a case using flashbacks and interrogation sequences. The game features Japanese voice acting with English subtitles, a nostalgic rural setting, interrogation (MAX mode), branching choices affecting up to five endings, and in the Last Answer edition, a live-action drama mode and new epilogues.