What's a romance anime about an adult couple?

'Cause the only Roms and RomCom anime I see are about teenage/young adult couples, but not adult ones

So I wonder if there's any Rom anime like that

Also, I just watched Crazy, Stupid, Love the other day, which inspired this question and makes me wonder, specifically, if there's a RomCom anime that has really good plot twists (since plot twists aren't usually in that kind of genre)