1girl, back, back_cutout, black_one-piece_swimsuit, blush, breasts, closed_mouth, clothing_cutout, competition_swimsuit, dated, embarrassed, from_behind, kantai_collection, large_breasts, long_hair, looking_at_viewer, looking_back, low-tied_long_hair, m.a.o, one-hour_drawing_challenge, one-piece_swimsuit, profile, racerback, red_eyes, red_one-piece_swimsuit, solo, swimsuit, twitter_username, two-tone_swimsuit, undressing, wavy_mouth, white_background, yamashiro_(kancolle)