 If you liked
Ki ni Naru Mori-san
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 ...then you might like
Sekimen Shinaide Sekime-san
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-Both manga have something in common where there are characters who are shy but in Ki ni naru mori-san the MC is shy, while in the Shinaide sekimen-san the Heroine is shy.
-Pretty much tell about romantic life at school
If you like the school romantic genre, I suggest you read it