I Don't Believe in Something Like Magic, but I Believe in You

Mahou Nante Shinjinai. Demo Kimi wa Shinjiru.
魔法なんて信じない。でも君は信じる。

Other

The Witch at the End of the World
Sekai no Owari no Mahoutsukai· 世界の終わりの魔法使い
manga

1000 years ago, a war between humans and space witches ravaged the stars, destroying countless planets and taking even more lives. Eventually, the humans captured the most powerful witch and imprisoned her as a war criminal under the treaty. The castle where the Magic Lord is sealed away is watched over by a village where everyone has developed weak magical powers—everyone but Mugi, that is. Determined to prove that he doesn't need magic, Mugi accidentally flies into the monster-infested forest surrounding the castle and is saved by a girl that he has never seen before...