Whodunit: Who Said Hello?

In a bustling metropolis filled with eclectic characters, you play as an unassuming barista who inherits a mysterious journal filled with cryptic messages and clues. When a renowned detective mysteriously disappears after receiving a 'hello' from the city's shadowy underground, you must delve into the lives of the eccentric regulars at your coffee shop. Each character has a secret, and your choices will reveal hidden motives as you untangle their stories and learn who truly 'said hello'. With branching paths and multiple endings, will you uncover the truth or succumb to the city's labyrinthine secrets?