Friends are getting married out of desperation.
絕望的日本人選擇和朋友結婚。

One of the main traits of the demographic time bomb is that young people focus a lot of their time on work instead of socializing, largely to keep up economically.
人口定時炸彈的主要特征之一是年輕人為了保持經濟獨立花很多時間用于工作，而不是社交。

They still want to get married, however, so the compromise they're making is just partnering up with friends.
盡管如此，他們仍然想結婚，所以他們做出的讓步是和朋友組成家庭。

It's a real-life version of that game "If we're both not married by the time we're 40..." — except people are playing it in their late 20s.
這就是那個游戲的現實版：“如果我們40歲前還沒結婚就……”只不過日本人從25歲以后就開始玩了。