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What is in the image: he image is a handdrawn illustration showing the anatomy of the human shoulder and arm, highlighting the muscles and their movements. it's annotated in japanese, indicating the different parts and their interactions. the drawing uses light blue shading to indicate muscle groups and black lines to delineate the bones and areas of connection. arrows illustrate the direction of movement and how different muscle groups work together. the text describes the curve of the arm from armpit to elbow and the connection between the arm, chest muscles, and shoulder.

WDTagged Character:

WDTagged Tags: solo, blue theme, 1girl, simple background, white background, arms up, upper body, monochrome, breasts, small breasts, on back, lying, pillow, sketch, cropped torso, armpits