User blog comment:Oppaichan/Rito and Lala still engaged?/@comment-6903908-20140105141057/@comment-3965848-20140105163856

It's true that Lala did call off the engagement to persue Rito's feelings honestly and by erasing everyones memories of her, which however didn't work, so I asume that they are still engaged especialy when Gid stated that if the engagement was call off the Earth would be destroyed, so it's safe to asume they still are.

And Momo's harem plan resolves around Lala being Rito's leguel wife in order for it to work.

What I'm more concern is if any human character is aware they're engaged,  some   might know they are together  but it was never stated that they a engaged to them. Yui would definately make an out burst about it which there is no record of.