2girls, akiyama_yukari, arm_strap, bat_wings, bikini, bikini_top_only, blouse, breasts, closed_eyes, comic, fake_head_wings, fake_wings, girls_und_panzer, greyscale, halloween, halloween_costume, hand_on_another's_head, head_steam, head_wings, interlocked_fingers, lap_pillow, leaning_forward, long_sleeves, medium_breasts, messy_hair, miniskirt, monochrome, multiple_girls, mushinosuke, navel, nishizumi_miho, ooarai_school_uniform, open_mouth, pleated_skirt, school_uniform, seiza, serafuku, shirt, short_hair, sitting, skirt, smile, swimsuit, wings