1girl, bare_arms, bare_shoulders, bikini, black_bikini, bocchi_the_rock!, breasts, cleavage, closed_mouth, collarbone, cube_hair_ornament, electric_guitar, gotoh_hitori, guitar, hair_ornament, instrument, large_breasts, long_hair, music, navel, one_side_up, pink_hair, pixiv_id, playing_instrument, solo, stomach, swimsuit, tsubame_tien, twitter_username, wavy_mouth