Root Letter: Last Answer is a visual novel that follows the story of Natsumi Kiyota, a high school student who receives a mysterious letter from her childhood friend, Takato Mariyama. The letter leads to a series of events that forces Natsumi to relive memories and confronts her past.
The gameplay is primarily focused on exploration and interaction with the characters. Players will navigate through the story by making choices and engaging in conversations with other characters. The game's story is heavily influenced by the player's decisions, making each playthrough unique.