saitou natsuki, tomoe rena, kourin tenshi en ciel rena, game asset, large variant set, lowres, non-web source, official art, self-datamine, variant set, 1girl, 2000s (style), black thighhighs, blush, bow, brown eyes, brown hair, long hair, open mouth, parted lips, ponytail, ribbon, school uniform, serafuku, simple background, skirt, solo, tachi-e, thighhighs, transparent background, zettai ryouiki