Nananenme no Kazoe Uta

A young woman finds herself in a mysterious room with a locked door and a child who claims to be counting down to her death. Each time the child counts, the woman must solve a riddle or face dire consequences. As the countdown continues, the stakes rise and the woman must use her wits to survive. The situation becomes more intense as the child's riddles grow more complex and the woman's time dwindles. The story explores themes of fear, survival, and the unknown.