Sound of Drop: Fall into Poison is an immersive adventure game set in the mysterious Manten Aquarium in Tokyo. Players take on the role of junior high school students Mayu and Himeno, who delve into the urban legends surrounding the aquarium, including eerie tales of blood-red waters and man-faced fish. The narrative unfolds as the characters explore the aquarium, unraveling the secrets hidden within its depths.

As the story progresses, the game takes a darker turn when Mayu catches sight of her missing sister, Mari. This pivotal moment propels the players into a gripping chase, filled with suspense and intrigue. The combination of an engaging storyline, atmospheric setting, and unique character dynamics makes Sound of Drop: Fall into Poison a captivating experience for adventure game enthusiasts.