 If you liked
Butai ni Sake!
|
 ...then you might like
Kaoru Hana wa Rin to Saku
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Both mains deal with anxiety and trying to cover it up by pretending everything is alright, and gain character development as they get closer to new friends in high school. While Butai ni Sake! is theatre-focused and Kaoru Hana is romance-focused, they're both very wholesome and cute manga.