A chain of popular tweets began with Japanese and Korean women warning each other about the dangers of dating men from their respective countries and commiserating. When one user suggested that Japanese and Korean women should just date each other, artists quickly began to draw Korean woman x Japanese woman yuri.
The "Korean woman" is typically drawn with black hair and very confident and assertive, while the "Japanese woman" is typically drawn as a brown-haired, nervous, blushing mess. Sometimes a Chinese woman gets thrown in as well (e.g. post #8047719, post #8048076).
Some Japanese women have tweeted stories about dating or flirting with Korean women (and vice versa) which have been drawn (e.g. post #8048084, post #8048092).
Since becoming popular, it has also spawned spinoffs involving other countries.
