"When I grow up, I want to be a knight as mighty as my father!"
"Then when I grow up, I want to be the most famous opera singer!"
"All right. Once I'm a knight, I'll bring lots of other knights to see your performances. Then you'll be even more famous than 'the most famous.'"
"It's a promise! Whoever breaks it is a little puppy!"
Many years later, the boy really did become a glorious knight of the Church. And the girl who had dreamed of becoming an opera singer... became a mercenary.
Spoiler and setting notes
1. This is a magical world that has entered the interstellar age, with mecha and starships zipping all over the universe, as well as mages who can cast spells with a wave of their hands.
2. It's pseudo-interstellar and pseudo-Western fantasy. Everything is made up by the author. If you spot any unbearable bugs, please point them out gently, dear readers. OTL
3. The male lead is set, but romance really isn't everything.
