1girl, azuminonomizua, babydoll, bare_shoulders, blunt_bangs, blush, breasts, cellphone, cleavage, greyscale, holding, holding_phone, katou_asuka, large_breasts, lingerie, long_hair, monochrome, negligee, nightgown, parted_lips, phone, see-through, smartphone, smile, solo, spaghetti_strap, talking_on_phone, underwear, underwear_only, upper_body, watashi_ga_motenai_no_wa_dou_kangaetemo_omaera_ga_warui!