In the manga, Langa and Reki do get together. Their journey is filled with challenges and growth that eventually lead to them being a couple. The author does a great job of building up their connection.
In the manga, Asta and Noelle's relationship progresses gradually. They face many challenges together, and eventually, their feelings for each other blossom into a romantic connection.
Well, it depends on how you interpret the story. Some might say they do, as there are hints and developments that suggest a romantic connection. But it's not a straightforward and obvious ending.