arihara ema, ryou (pixiv247657), kagamine len, kagamine rin, vocaloid, translated, 1boy, 1girl, ahoge, bare shoulders, belt, blonde hair, blue eyes, blush, brother and sister, couch, detached sleeves, ear cleaning, eargasm, embarrassed, hair ornament, hair ribbon, hairclip, hand on another's head, hand on another's knee, kneehighs, knees, lap pillow, lying, midriff, mimikaki, navel, open mouth, ribbon, short hair, shorts, siblings, sitting, socks, sweat, sweatdrop, tickling, tickling ears, trembling, twins, uncommon stimulation, wavy mouth