This building is the main headquarters for Monotone Records, a record label based in Harajuku. Almost everything inside is monotone (black/white/gray) and everyone speaks in monotone voices. It is revealed that all the employees of Monotone Records are androids, who follow commands from Monotone, an evil supercomputer who doesn't believe in individuality.
The elevator inside plays music by artists signed with Monotone Records. The hallway leading to the main office is filled with portraits of various artists signed with the company. There is a jail area where people who refuse to sign the contract are held hostage for the rest of their life or until they agree to sign the contract.