1boy 1girl black_eyes blonde_hair bow breasts brother_and_sister crop_top detached_sleeves hair_bow hair_ornament hairclip happy_birthday headphones headset kagamine_len kagamine_len_(vocaloid4) kagamine_rin kagamine_rin_(vocaloid4) limited_palette looking_at_viewer midriff moa_(fade64222) number_tattoo sailor_collar shirt shorts shoulder_tattoo siblings sketch sleeveless sleeveless_shirt small_breasts tattoo treble_clef twins upper_body vocaloid