1girl bangs blue_hat blue_shirt brown_hair closed_mouth commentary dress_shirt eyes_closed facing_viewer girls_und_panzer grey_legwear grey_skirt hat holding holding_instrument indoors instrument kantele keizoku_school_uniform kneehighs long_hair long_sleeves mika_(girls_und_panzer) miniskirt music omachi_(slabco) playing_instrument pleated_skirt school_uniform shirt sitting skirt smile socks solo striped striped_shirt vertical-striped_shirt vertical_stripes white_shirt