ADA is a fantasy interactive emotional narrative work centered on the core concept that “funeral customs determine the form of the afterlife”. The story follows Ah Deng, a girl whose family runs a cemetery. After an accident, she is transformed into a memorial kerosene lamp and enters an afterlife world shaped by different funeral traditions.

　　In this world, the form of the deceased is closely linked to the way they were buried: those in tree burial become earth and trees, those whose ashes are made into portraits become souls within the paintings, and those in sea burial merge into the vast ocean… Players control Ah Deng to explore various regions, using platform jumping, collecting memorial items and memory fragments, solving jigsaw puzzles and other interactive mechanics to gradually uncover the stories and unfulfilled wishes of the deceased, while gathering soul power that symbolizes blessings.

　　As the journey progresses, Ah Deng not only helps others fulfill their wishes but also completes a transformation in self-awareness. Set in a fictional afterlife, the work explores real-life perspectives on life and death, guiding players to reflect on the meaning of life and the attitude of “living toward death” through the blend of interaction and narrative.