Anyone remember this anime?

I’m trying to find an anime (around 2024–2025) set in a fantasy magical world.

The MC is very skilled/proficient in magic, but there’s a type of magic that can’t be learned normally through standard grimoires or books. At some point, he chooses a rare or unusual grimoire from a bookstore/library for a young female magician (a girl in his party), and she works extremely hard to learn it.