It is barely a design, as it is that simple.
The design is worked top-down and I have worked with making the neckline higher at the backside without using short rows. It succeeded – even with a neckline pattern. There is a small, simple lace pattern in the neckline, at the bottom and on the sleeves. This can of course be left out.
The cardigan is worked in knit stitches only and with a simple lace pattern.
Large in size as work in knit stitches tends to stretch. Pay attention to meet gauge and, if necessary, work in a smaller size.