1boy 1girl aqua_eyes arm_warmers bad_id bad_pixiv_id bare_shoulders blonde_hair blush brother_and_sister closed_eyes crop_top detached_sleeves hair_ornament hair_ribbon hairclip headphones hirococo hug kagamine_len kagamine_rin kneeling leg_warmers midriff open_mouth ribbon sailor_collar short_hair shorts siblings sitting smile twins vocaloid