1girl, arm_support, black_hair, blue_one-piece_swimsuit, breasts, dated, feet_out_of_frame, hair_ornament, hairclip, invisible_chair, kantai_collection, long_hair, looking_at_viewer, masara_(chuujou), medium_breasts, name_tag, one-piece_swimsuit, oyashio_(kancolle), school_swimsuit, sitting, solo, swimsuit, twitter_username, yellow_eyes