Academy for Advanced Alchemy4 books in series
King of Alchemy Publisher's Summary
What do you do when you follow a strange girl through a wall into a world where alchemy is real? You move in with her cousin, become a magic barista, and try your hand at higher education one more time.
Only instead of biochemistry and physics, you're taking elixirs and searching the school grounds for secret chambers and long-lost spells.
How do you go from someone who was never supposed to wind up here in the first place to becoming the greatest alchemist that ever lived?
All you'd have to do is find a loophole from the real world that lets you use cheaper ingredients to mimic powerful spells.
Sounds easy, right?