You're going to start off in a bedroom facing a recess with some glass vases with some sakura branches in it. You're going to turn to the left until you see an open door out of the bedroom. You're going to proceed towards the open door, down the small flight of stairs, and exit the bedroom. Continue along the hallway, going down more stairs, until you can make a slight left through the two open doors that lead to an exercise room. Step over the exercise mattes, and come to a stop before the rounded window. This is your destination.