beer hsk, agnes tachyon (tach-nology) (umamusume), agnes tachyon (umamusume), umamusume, 1girl, :>, ahoge, animal ears, collared shirt, eighth note, hair between eyes, head tilt, horse ears, horse girl, horse tail, lab coat, long sleeves, monochrome, musical note, necktie, open clothes, pantyhose, parted lips, shirt, shoes, short necktie, simple background, sketch, sleeves past fingers, sleeves past wrists, solo, tail, triangle mouth, walking, white background