In 'Whose Diary Is It Anyway?', players step into the chaotic life of Sam, a witty and sarcastic teenager who discovers a mysterious diary in the attic that doesn't belong to anyone in their family. Each entry reveals secrets from various characters in the neighborhood, and Sam must uncover whose diary it is before the next full moon, when the diary's spells are activated. Players are faced with choices that shape relationships and dynamics, leading to intriguing revelations and humorous encounters as they navigate a web of interconnected lives.