In 'Whose Diary Is It Anyway?', players step into the shoes of Max, a quirky amateur sleuth attending a quirky reunion in an old, eccentric mansion filled with notable characters from their high school's past. When a mysterious diary belonging to one of their old classmates goes missing, Max finds themselves entangled in a hilarious web of secrets, misunderstandings, and exaggerated high school drama. As players navigate through witty dialogue, comedic misunderstandings, and outrageous mini-games, they must gather clues, interrogate old friends, and piece together the identity of the diary's true owner before the night ends. With every choice impacting the outcome, can Max reveal the truth without embarrassing themselves and their classmates in the process?