toshi (little-fluffy-cloud), fujibayashi kyou, fujibayashi ryou, ichinose kotomi, clannad, translation request, 00s, 2girls, angry, breast envy, diagram, dutch angle, flying sweatdrops, geometry, hair bobbles, hair ornament, hat, long hair, looking back, math, multiple girls, oekaki, one-piece swimsuit, purple eyes, purple hair, school swimsuit, school uniform, short hair, siblings, sisters, swimsuit, trigonometry, twins, twintails, two side up