Photographers capture the rise of South Korea's 'loner' culture
https://edition.cnn.com/style/article/honjok-south-korea-loner-culture/index.html
As far as I know people in Korean or Japanese youngstars strongly tied with traditional family systems have to live with undemocratic and unreasonable rules. And then, they try to flee from families.
Extremely speaking, they are forced to choose liberty or family.
To divert low fertility rate into higher one, elderly people will have to think about a system which doesn't force younger generation to endure meaningless suffering.
