1girl, arm_support, bare_shoulders, bikini, blush, breasts, collarbone, folded_ponytail, from_side, kaguya-sama_wa_kokurasetai_~tensai-tachi_no_renai_zunousen~, leaning_back, looking_at_viewer, looking_to_the_side, navel, parted_lips, red_bikini, red_eyes, shinomiya_kaguya, shou937, sidelocks, simple_background, sitting, small_breasts, solo, swimsuit, white_background