1girl ? armpits arms_up bare_arms bare_shoulders black_sweater blush bra_strap bra_visible_through_clothes breasts covered_nipples earrings highres jewelry large_breasts long_hair looking_at_viewer mask motion_lines mouth_mask original pink_eyes pink_hair ribbed_sweater simple_background sleeveless sleeveless_sweater solo speech_bubble spoken_question_mark stretching sweater syuntyu_katze twitter_username upper_body white_background