In 'Whose Diary Is It Anyway?', players take on the role of an amateur detective who stumbles upon a mysterious, discarded diary at a quirky thrift shop. The diary belongs to a different person each chapter, and as the player reads, they are confronted with the confessions, secrets, and absurd anecdotes of its various owners. Players must engage in lively dialogue with the diary's former owners—all quirky characters with hidden motives—to uncover the truth of who the diary originally belonged to and what scandalous events led to its abandonment. As clues unravel through humorous interactions and unexpected plot twists, players will find themselves entangled in a web of relationships that are anything but ordinary.