Sometimes, simplicity is the ultimate sophistication and this picture is one of the best. Nice pose, face's expression... very nice shot! Side question, is she the model you started to photography long time ago?
The addition of the lock on the door is an interesting touch.
The Western part of me (born in Canada) suggests that the door is locked, and the model cannot get through - accompanied with speculations on why she wants or needs to get through the door (some positive, most negative. Ie: she's locked out by her lover).
The Far Eastern part of me (I've been living in Japan for over 10 years) reminds me that young lovers profess their love by locking one of those locks on someplace or something notable, usually in a date spot. Which spawns thoughts on why she's sitting underneath it (some negative, mostly positive. Ie: she's can't believe what she's just gotten herself into).
Her expression also adds a level of depth - both an external reaction to something and internal deep thoughts.
Ultimately I have to agree, one of your better pictures that works on multiple levels (visual, emotional, and so on).
I totally agree with you my friend, thank you. I have long winded disagreements with other photographers about what constitutes a good photo or not. They go on and on about technical matters that have next to nothing to do with the ultimate "impact" of a photo. That is what it's all about, and the reaction it provokes of course.