“1999TOKOYO Building” is a visual novel & adventure game where you deepen relationships with peculiar employees and aim to escape from a crumbling indoor amusement park.
The “TOKOYO Building,” rumored to make people vanish, is an indoor amusement park surrounded by massive water tank. Though practically a ruin, it never closes, and live-in employees still work there today.
The protagonist, Akira, becomes an employee of this building after getting lost inside it.

Use the information you've gained through your lock-picking skills to build rapport with the employees.