Aura: Maryuuin Kouga Saigo no Tatakai

Basically the same premise in both. Guy has an "imaginative" childhood, becomes ashamed of said childhood, switches schools to avoid being bullied, meets girl at new school that is currently having an "imaginative" period, guy inevitably gets mixed up in the girl's "adventures", and resolves himself to help her return to reality. 

Similarity: - The MC has traumatic past, and develop trait from it (Chuunibyou and Silent) - The Prince save the MC with their ability (Chuuniboyu and Music) 

Both Films have a similar vibe like repenting on there action from there past and befriending the person they trigger they're past mistake. Both Film are very good, kinda a tearjerker. 

both of the anime deal with the message of what normal is, Plus they have beautiful art. 

both are about chuunibyou and the boundary between chuunibyou and fantasy is blurring 

In both series, there's a weird girl trying to befriend a seemingly normal guy but in reality everyone is a bit weird on the inside.  

Romeo Tanaka wrote the novels that both Jintai and AURA adapt. The similar writing style shows throughout both series, but AURA is grounded in reality and heavy-handed seriousness (with some great, realistic drama throughout), while Jintai is a far more surreal and playfully cynical work, with a hint of optimism and idealism thrown in there (but it can do drama just as well as AURA when it wants to). Despite their disparate perspectives, the characters are characterised and developed in similar ways. AURA is reminiscent of Jintai, without all of the surreal and more unorthodox elements. AURA is the later work, so it is easier to compare Jintai with AURA than AURA with Jintai. The most prevailing element that both series have in common is their propensity for social commentary; they just do it in very different ways. If you liked Jintai, check out AURA--you'll probably like it. If you liked AURA, check out Jintai--you'll likely enjoy its satirical social commentary and it's quirky, sometimes overwhelmingly cynical (Watashi in particular is the darkly cynical heart of Jintai) characters. read more 

If you're looking for anime that deal with characters and their social problems in a realistic and serious manner, then look no further. The theme of escapism permeates these works, and the characters struggle with the world and people around them. Perhaps you may even relate to some of the problems they face. Whether that is the case or not, there is still a sublime message lying in both of these great titles. 

The main girl likes odd things and refuse normal life, but in a different way. The male lead is a disillusioned boy that have to deal with the strange and curious girl. 

Once again, different is better. The female lead hate the normal things, and tries to drags the male character into her "world". 

chuunibyou protagonist and some main character, the protagonist also try to forget his embarassing past but end up use that as his weapon sometimes romance in chuunibyou, although the story is more focused on fake lover like nisekoi 

Both movies revolve around the subject of escapism, protagonists' desire of getting away from reality (although shown in completely different ways), and the hardships of those who try to help them. If you enjoyed Kotonoha no Niwa and would like to watch a bittersweet drama, try Aura.