First Office

The first available office in the Ultimate Custom Night is styled after the office from Five Nights at Freddy's 1. The office has both left and right doorways, two air ducts leading into the office, a vent doorway at the top of the office, and a small vent to the player's right.

General Layout
The office's floor has black-and-white tiling studded with colorful stars and glitter. Each of the doors have yellow-and-black striped doorframes, and a bin full of animatronic heads is visible on the player's left. There is a collage of children's drawings on the walls around the room, and an empty Freddy Fazbear head and torso is propped up on the right side of the room.

Office Details
On the left side of the room, a poster featuring a waving Circus Baby and a Bidybab is visible on the wall, bearing the slogan "CELEBRATE!" Above the right door, there's a purple banner with the words 'LET'S PARTY!!!" in green lettering. On the right wall, there are two rather ominous-looking posters. One poster is a darkened image of the Marionette's face (possibly the Nightmarionne, given its clearly-visible white pupils), and the other has an image of a clown grinning with a speech bubble featuring maniacal laughter. The clown has bright white eyes and wears a white ruff and appears to be dancing with a grin stretching from ear to ear. Red lettering over the clown's lower body appears to read "YOU DON'T WANT TO MISS IT," although the writing is messy and somewhat unclear.