Start with the basic shape. Sketch an oval and then add the upper and lower eyelids. Pay attention to the size and shape of the iris and pupil. Add highlights and shading for depth.
One possible theme could be self - discovery. Since the girl is described as 'a little wild', she might be on a journey to figure out who she really is and what she wants in life.
The appeal lies in its engaging plot that keeps you hooked. The character development is well-done, and the emotional depth makes you invested. Also, the visuals are top-notch.