1boy, 1girl, age_difference, bad_twitter_id, black_pants, brother_and_sister, brown_hair, closed_eyes, hetero, honjou_ruri, honjou_satoru, honnryou_hanaru, incest, kiss, limited_palette, long_hair, original, pants, shirt, short_sleeves, shorts, siblings, sitting, sketch, straddling, sweat, white_shirt, white_shorts