you can either start the sort with when they first meet or when they are partners

Storyline — “Two Flags, One Heart”

Hannie Jisung is a young Chinese soldier known for being quick-thinking, energetic, and surprisingly talented despite her tendency to talk when she’s nervous. She is half Korean through her mother, but she grew up in China and considers herself completely devoted to the country she serves. Minha Minho is a Japanese soldier who is almost the complete opposite—quiet, disciplined, intimidating, and incredibly difficult to read. She is also half Korean, though she rarely talks about her Korean heritage and keeps most of her personal life private.

The two meet during a joint international military training program where soldiers from different countries are temporarily brought together. From the moment they meet, Hannie and Minha clash. Hannie thinks Minha is cold and arrogant, while Minha finds Hannie distracting and far too loud. Their rivalry only grows as they repeatedly compete against each other during training exercises.

But as the weeks pass, they slowly discover how much they have in common. Both grew up with complicated feelings about having two cultures, both understand Korean despite rarely speaking it around others, and both secretly feel caught between different parts of their identities. Their rivalry gradually turns into an unexpected friendship, with the two beginning to rely on each other during difficult assignments.

Then their training comes to an end, and they are forced to return to their respective countries. They exchange a promise to stay in contact, but military duty makes that harder than either expected.

Months later, Hannie receives unexpected news: their countries are participating in another international operation, and Minha has been assigned to the same unit.

This time, however, they aren't just rivals meeting on opposite sides of a training field. They're partners—and they'll have to decide whether their loyalty to their countries can coexist with the bond they've formed with each other.

[Prompt #1]

The training grounds were already crowded when Hannie Jisung arrived with the Chinese delegation, her uniform neatly pressed despite the slightly nervous energy she carried. Across the field stood the Japanese soldiers, lined up with almost perfect discipline. Hannie's attention quickly landed on one particular soldier—Minha Minho, a quiet Japanese soldier with an unreadable expression and an intimidatingly calm presence. Their commanding officers soon announced that the two groups would be participating in a joint training exercise, and, as luck would have it, Hannie and Minha were assigned to the same team. Hannie glanced at her new partner and gave an awkward little smile. “So... you're Minho, right?” Minha simply looked at her for a moment before giving a short nod. “And you're Jisung.” Hannie blinked. “You already know my name?” “I read the assignment list.” “...Right. Of course you did.” It was obvious from that first exchange that they were going to have very different ideas about how this partnership was going to work.

[Prompt #2]

The training grounds felt strangely familiar when Hannie stepped onto them again, but she wasn't expecting to see a familiar face among the Japanese soldiers. Then she spotted Minha standing across the field, looking just as calm and unreadable as she remembered. Hannie's face immediately lit up. “Minho!” she called, practically jogging over to her. Minha turned, and for the briefest moment, her usually serious expression softened. “Jisung.” Hannie grinned. “Wow, you actually remembered me.” Minha raised an eyebrow. “You were difficult to forget.” Hannie laughed, nudging her shoulder lightly. “I'll take that as a compliment.” They fell into an easy silence for a moment, neither quite willing to admit how happy they were to see each other again. They weren't exactly friends yet—but after everything they'd been through during their first training, the constant arguing had slowly turned into teasing, the awkward conversations into comfortable ones, and somewhere along the way, neither of them wanted to call the other a rival anymore.