Start from a basic dress with darts and a basic sleeve. On both front and back, lower from the shoulder point 5-7 cm along the armhole, then take off the same measurement from the front and back sleeve cap. On the front, draw the underline and draw overlapped part to the other bust point. Widen the shoulder dart by 1 cm at the neckline to have the bodice more fitted then draw some slash lines for the dart manipulation at under bust. On both front panel, discard the waist darts by taking their volume from the side seam and centre back. On the sleeve, draw the cuff 10 cm high and at its half draw the sleeve wider. Trace the front bodice separately and cut through all slash lines, eliminating the volume of all darts. Separate the pieces evenly to create the drape and mark all the pleats with notches and arrow to have the sewing reference. Get the sleeve and draw some vertical slash lines. Cut and separate the pieces adding more volume for the gathering, then mark it on both upper and lower edges. Here are the full pattern: back, front and sleeves.