 If you liked
Tonari no Kashiwagi-san
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 ...then you might like
Horimiya
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The opening is very much like Horimiya yes, with the perfect girl (Hori/Kashiwagi) and the not-so-popular guy (Miyamura/Yuuto). Tonari no Kashiwagi-san features the 2 officially becoming a couple at a much later time than say Horimiya, but both do involve the 2 growing to become more familiar with one another.