Gf thinks that anime are childish and weird. Looking for soul crushing shows that will change that

She's actually open to try anything small like a move or a small series <20 episodes

I tried watch with her Orb:On the movements of the earth but when she learned that it will be 24 episodes she didn't really want to continue watching even if she actually liked it

I am mainly looking for shows that cover heavy topics that not everyone can watch them