I am thinking. (assignment #2)

Absolutely, Alternative to Marriage is too strange to me. Because I never heard about this situation when I livied in Korea. Also almost parents want that their children will be married with good person in Korea. My mother too. In America, some American live with their partner over 5 years without marriage. This is too long time to understand each others. If they are Korean than their parents never admit living together long time also almost neighborhood don't like them because they think that it effects bad things to their chilren.

Alternatives to Marriage ( 1#)

I could read kind of Alternatives to Marriages. Example, Living Together (People who are unmarried live together), Living Alone (They want to live alone. Recently, It is common.), Unmarried childbearing and parenting (41% of them who are unmarried have baby under 18 years old. More about unmarried different-sex couples (55% of them get married within 5 years of moving in together ; However, 40% of them break up at same time ; Otherwise, 10% of them remain in unmarried over 5 years.).
Also, I could find rate of kind of Alternatives to Marriages.