1girl, arms_behind_back, bare_shoulders, bikini, blush, breasts, cleavage, closed_eyes, closed_mouth, collarbone, frilled_bikini, frills, hataraku_maou-sama!, hiiragi_akio, innertube, large_breasts, orange_bikini, orange_hair, sasaki_chiho, short_hair, short_twintails, signature, simple_background, smile, solo, swimsuit, twintails, upper_body, wet, white_background