Liar Game
The purpose of the LGT Office is revealed in the last chapter. At the head of the office are those who wished to recreate the conditions in a radical political work whose last volume was confiscated in order to surmise its contents. The other members with patterned masks had participated in an initial attempt to conduct a simulation of the radical work, i.e. a first Liar Game Tournament. They agreed to return to help in the second (successful) attempt at holding a Liar Game Tournament. This second tournament is what is described in the manga.