My first impression of your piece was really emotive because in my opinion the theme represented here a strong direction of the eyes are directed to "Us" I loved that because it's captivating. The chose of black and white was interisting too because we can focus more in the contrasts between the bars (vertical) and the whole set that is from behind as the model too. we can see that this picture have so many graphic values like textures in the model costume and shadows especially in the area of Bedlinen. I loved the way the hair is because it looks so natural and and the petals fall upon the model enrich the same naturalness. It creates almost a paradox between the idea of being "closed" and freedom conveyed by nature.
Regarding to the technical aspects : in my opinion i thkink that you did a good job on focus and perception because the center of the atention it will be for the face and bars. i loved the model expression too. To improve i think that you could highlight a bit more contrast in the shadows to accentuate more the face according to the surrounding environment (but if you have not a artificial light because if so I take that back) And i can see a a little of your hand ... perhaps her position should also be studied better because that way i think that loses some relevance to be "half hidden" A sugestion :This is just an ideia ... you could you put the petals in the original colour and you keep the rest of the image black and white ... I think it would create a effeito have some interesting detail with color.
well i hope that could help you Thank you for sharing this amazing piece!