NTR Alchemy ~Before I knew it, my beloved wife and best friend completed the human transmutation~

A year ago, Clyde planned to go to a city and stay there for a while to study alchemy.
However, in his hometown, there was a girl he was in love with, his childhood friend Leina.
So Clyde decided to - make her his wife and ask her to wait for his return.
Soon, Clyde was indeed back as a licensed alchemist, but...