nai kitsu, kagamine len, kagamine rin, vocaloid, bad id, bad pixiv id, 1boy, 1girl, aqua eyes, bass clef, black border, blonde hair, border, breasts, brother and sister, detached sleeves, hair ornament, hair ribbon, hairclip, hetero, holding hands, midriff, navel, necktie, open mouth, ponytail, ribbon, sailor collar, short hair, shorts, siblings, small breasts, tongue, treble clef, twins, yellow necktie