They're going bang and then go back to their lives. He'll still marry the girl, she'll settle with the guy who wants to date her with an eye towards marriage. That's my guess.
Some people (only certain types thankfully) need to burn down their lives in order to cleanse themselves of the poor choices and ever poorer behavioural traits they are bound to. Its devastating and brutal for Kaori, his and her families will be flabbergasted.