In a quirky, bustling city where everyone seems to have forgotten their own greetings, players step into the shoes of a sardonic local detective, tasked with the peculiar mystery of unclaimed hellos. Each day, the protagonist receives bizarre notes from anonymous senders, containing nothing but strange greetings and peculiar clues. As players navigate through a colorful cast of eccentric characters and absurd scenarios, they must unravel the tangled web of identities and intentions behind the odd hellos, while making choices that sway the direction of the story and ultimately uncover the truth. The investigation takes them from coffee shops to midnight karaoke joints, with unexpected twists and hilariously awkward encounters.