looking for a story

[shion11]

i'm looking for a story that's either in grometsplaza or gaggedutopia.
i strongly think it's on groemtsplaza.

it's about a detective or agent looking into the disappearance of a girl at a place with pony play involved, and after the rescuer rents a room he asks about pony play,and later at night he breaks in the stables to find a confused pony girl that alerts the guards.
After trying to hide in a closet of pony suits he puts on a pony girl outfit and in the morning, he forgets about who he is and is stuck there while his back up find his room with his stuff in it.