Quite many girls I knew were at least partly lesbians.
One of the girls who was my Hoobae (me being "senbai" to her) at HUFS French department in 1996-1998 told me her experiences. Once she was watching TV with her parents at home. Her father said something bad on some lesbian reports without knowing her own daughter was one. She stood up and announced, "Yes, I am a les" loudly. She's about 140cm tall and was soon beaten to semi-death.
She later went to China, somewhere in Manchuria, perhaps to study Chinese and Marxism. At least one of her Marxist Senbai, a female who was one year younger than me, seemed to sleep often with her.
A girl with a nickname Jenny also told me she often slept with girls and that she liked females for sex. Since sex itself is tabooed in South Korea and nobody openly talks about it, there are a lot of dark sides, rarely discovered and documented. A lot of rapes and sexual abuses as well. Fashional divorces. Jenny was the first girl I loved as a female, and the last, but she seemed to date playboys only. (I already confessed I'm cold-blooded.)