1boy, 1girl, adolescence_(vocaloid), ahoge, bare_arms, bare_shoulders, bockdog, brother_and_sister, camisole, collarbone, collared_shirt, eye_contact, frilled_camisole, frills, good_twins_day, hair_ornament, hairclip, kagamine_len, kagamine_rin, kneeling, looking_at_another, neck, shirt, shoes, short_ponytail, siblings, sketch, sleeveless, sleeveless_jacket, spaghetti_strap, squatting, swept_bangs, tearing_up, twins, vocaloid