At 109, bear left up the tree-lined street known as Dogenzaka. Stay on the right side of the street. You will pass Uniqlo. Then you will see a MOS BURGER on your right. Turn right into a small street after MOS BURGER. Then you will see a brick building in front of you, where there is a hill, diagonally to the left of the brick building. Bear left up this street. You will see a love hotel on your left and you will see the sign for the Ruby Room on your right. It is on the 2nd floor of a white tile building.