1boy, 1girl, a.i._voice, ahoge, black_jacket, black_shirt, black_thighhighs, border, brother_and_sister, brown_cardigan, cardigan, cellphone, grey_skirt, hair_ornament, hairclip, hand_up, holding, holding_phone, jacket, light_blush, looking_at_phone, looking_down, miniskirt, open_cardigan, open_clothes, phone, purple_eyes, purple_hair, red_background, shirt, short_hair, siblings, sitting, sitting_on_lap, sitting_on_person, skirt, smack, smartphone, sweat, thighhighs, turtleneck, v-shaped_eyebrows, voiceroid, white_border, white_shirt, yuzuki_yukari, yuzuki_yukari's_younger_twin_brother, yuzuki_yukari_(shizuku), zooanime