In 'Hello, Whose Nightmare?', players assume the role of Max, a dream architect who designed nightmares for a living—until his own creations begin to haunt him. After a mysterious incident causes Max to switch places with his own nightmare, he must navigate a surreal world filled with bizarre characters and twisted scenarios. As players unravel the dark mystery behind the nightmares, they will face choices with high stakes that affect the boundaries between reality and the dream world. Unraveling the origins of the nightmares leads to unexpected plot twists, challenging players to confront their own fears and passions.