The Mermaid Who Swallowed a Ruby

"Congratulations on your graduation."

His young junior was staring intently at Harriet with unwavering eyes. The red pupils meeting his own sparkled beautifully like rubies.

"I will. I will make your wish come true."

Why?

"...When that time comes, please take me as your adjutant."

That was something he hadn't expected at all.

And several years later, Harriet's 'Ruby' appears before him, now a war hero.

.

.

.

"Height 182cm, weight 75kg, a genius whose abilities emerged at ten years old, favorite food is cocoa. On weekends, he mostly reads or sits in his favorite café enjoying quiet contemplation. For reference, I spend all my weekends observing him. Ah, don't misunderstand. It's just that after seven years of unrequited love, I've memorized these things."

His aide, who had never witnessed the man speak at such length, turned pale.

'The world generally calls that being a stalker.'