monolith_(suibou_souko), mika_(girls_und_panzer), year_2024, 1girl, blush, breasts, brown_eyes, brown_hair, closed_mouth, grey_background, instrument, kantele, keizoku_school_uniform, long_hair, looking_at_viewer, school_uniform, simple_background, small_breasts, solo, tulip_hat, highres, girls_und_panzer