sakura akami, erica hartmann, strike witches, world witches series, bad id, bad pixiv id, 1girl, :o, backlighting, bare shoulders, bed, blanket, blonde hair, camisole, collarbone, colored eyelashes, cowboy shot, crop top, dark, female focus, flat chest, indoors, lying, matching hair/eyes, navel, on bed, on side, open mouth, orange eyes, orange hair, panties, parted bangs, pillow, short hair, solo, swept bangs, under covers, underwear, underwear only, white panties