In 'Whose Hello?', players step into the role of a washed-up voice actor who discovers a series of mysterious voicemail messages from an unknown number, each revealing a secret past connection to a former life. As players unravel the threads of these messages, they navigate through twists that lead to poignant revelations about friendship, betrayal, and the price of fame. The interactivity allows players to choose how to respond to the messages, leading to multiple endings based on their choices, all while uncovering the identity of the mysterious caller and their own buried truths.