In a bustling city filled with mysteries and secrets, you are a hapless amateur detective who stumbles upon a peculiar diary at a café. But this isn't just any diary: each day recounts a different person's life, complete with choices they've made and paths they've taken. As you dive deeper, you realize the entries are not just fictional; they intertwine with real events happening around you. Players must read entries, interact with characters connected to the diary, and make critical choices that influence the story's outcome—unraveling mysteries, confronting moral dilemmas, and even disrupting someone's life plan. Every decision leads to a different ending, and you must determine the diary's original owner while exploring the tangled lives of its subjects.