On the second floor of the GREE headquarters office, an innovative tunnel entrance has been designed as part of the interior. This space features a work-play design, composed of a "box" made of punching metal, neon, and art graphics layered over white tiles, making use of reflection effects. Upon passing through the entrance, individual booths with a house-shaped arch built into the "box" line up, creating a comfortable workspace where each person's privacy is protected.