He is viewing that situation as a serious problem.

He views that situation as a problem.

It was revealed that he had an extramarital affair, which caused a big scandal.

She is a happy married woman.

We will attend a friend's wedding next week.

We respect the principle of monogamy.

It was revealed that he was polygamous, which became a big problem.

I recently started marriage hunting.

I think same-sex marriage should be recognized in Japan as well.

They decided to get married with the same-sex person in Japan.