You're now facing the book shelf. Turn right, walk towards the wide entrance. From the wide entrance, you will see a staircase in front. Climb up the stairs completely and take right. You will now see a horse portrait on the wall. From there, take right and enter the bedroom. From here, turn left and walk straight towards the plant near the glass window. Just before the plant, turn left and enter the passage. Get inside and stand in front of the mirror, beside the bathtub, you will reach your destination.