1girl, armpits, artist_name, black_eyes, black_hair, blush, breasts, brown_sports_bra, clothes_writing, collarbone, cowboy_shot, kantai_collection, mizuta_kenji, mogami_(kancolle), navel, one-hour_drawing_challenge, open_mouth, short_hair, signature, solo, sports_bra, sportswear, sweat, twitter_username