How Did I End Up Marrying My Mortal Enemy?

Jiangnan, an S-rank esper.

The Blue Star Federation's top ace esper soldier, tasked with eliminating anomalous star beasts for the Federation.

Her favorite thing to do is sleep. The person she hates most is Ye Cailian, commander of the Esper Corps and its commanding officer.

Ye Cailian, an S-rank esper.

Commander of the Blue Star Federation's Esper Corps, responsible for managing and training its esper soldiers.

Her favorite thing to do is train new recruits. The person she hates most is Jiangnan, the Esper Corps' ace soldier. The reason is simple: Jiangnan is far too fond of doing things her own way.

But they got married.

P.S. A short, sweet story, probably under 100,000 words.

P.P.S. There really is no logic. Everything serves the plot.

P.P.P.S. I'm just letting loose, so don't overthink it.

Theme: Even sworn enemies can get married.