Rule 34 Dev - 1boy blue_eyes blue_hair blue_nails blue_scarf concert fingernails glowstick hand_on_own_face happy_tears highres holding holding_microphone kaito_(vocaloid) kikuchi_mataha light_blush long_coat male_focus microphone nail_polish open_mouth scarf short_hair solo sparkle surprised tearing_up tears teeth upper_teeth_only vocaloid|18433978524