 If you liked
Space☆Dandy 2nd Season
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 ...then you might like
Nihon Animator Mihonichi
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(As Nihon Animator Mihonichi is collection of unrelated stories, this recommendation is only for Me!Me!Me! part.)
Both start as something nice, happy but a plot twist happens and here you go on an acid trip. Both have sexuall undertone, which is heavier in Me!Me!Me!. If you liked one, you´ll like the other one.