In 'Whose Diary Is It Anyway?', players step into the chaotic life of a quirky amateur detective, Sam, who discovers a mysterious diary left behind at a suburban yard sale. As they delve into the entries, they find themselves embroiled in the lives of the various authors—each with their own oddball secrets and dramas. Players make choices that affect the interactions with the diary's owners, unraveling a tangled web of relationships, misunderstandings, and hilarious situations. The narrative leaps between different perspectives, inviting players to explore alternative endings based on their decisions, all while trying to uncover the diary’s true owner before the mystery spirals out of control.