 If you liked
Stella Jogakuin Koutou-ka C³-bu
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 ...then you might like
Houkago no Pleiades (TV)
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"Stella Women's Academy, High School Division Class C³" / "Stella Jogakuin Koutou-ka C³-bu" and "Wish Upon the Pleiades" / "Houkago no Pleiades" are both slice-of-life series by Studio Gainax surrounding a group of young girls.
The protagonists of the two shows have in common of being the newcomer to the group.