I'm actually more shocked than happy,
I had the image of a single Ayu, who is a power woman and defeats everyone everywhere and who will remain single her entire life in my head after her relationship with Nagase. XD
I don't mind that they are marrying after such a "short" time since a few days ago my cousin married after knowing her man for 6 months.
If you're sure than go for it !

Moreover I hope they will stay together forever, as it's always sad to see marriages break up, especially when the people are famous idols like Hikaru Utada or Namie Amuro...
But I am afraid her musical career will be making a loss by her marriage