I got a couple things. One, this should be M, for mature. Two, the face looks creepy, and derpy. Three, the anatomy is off. I would recommend studying anatomy more, and learn how eyes, and faces work. I would also reduce the breast size a bit, and learn breast anatomy, because it just looks like Lapis stuffed her bra with water balloons.
Overall, the only thing that saves this picture is the colors, lineart, lighting, and shading.
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