 If you liked
Nekojiru-sou
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 ...then you might like
Manie-Manie: Meikyuu Monogatari
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Nekojiru-sou and the first episode of Manie-Manie, Labyrinth Labyrinthos, both involve cats and a circus performance, with a similar and expressive animation where characters are constantly getting deformed. Nekojiru-sou is also darker and gory, something that can be found in the second episode of Manie-Manie, Running Man.