Oba means handsome boy in China and "brother" in Korean. Ouba is a kind of honorific title in Korea, and it is also a very intimate title between men and women. It is very common in Korean dramas. Girls call boys Oba. In China's online language, this title means like and close, even a little ambiguous. The word "Ouba" is now widely popular among young girls in China, which comes from Korean dramas. Many young people in China call Korean stars Ouba, which shows the influence of Korean star teams among young people in China.
Oba means handsome boy in China, but it means "brother" in Korean, and it is also a respectful name in the eyes of Koreans. Ouba can only be used between some close boyfriends, which is very popular on the Internet.