Been reading Otoyomegatari again from the start, these two are so perfect together.
It took Eumenes only few seconds for Eumenes to be convinced that Earth is not flat. That was ~2300 years ago.
(I know it's most likely not a real account of what had happened, but Iwaaki's storytelling is still pretty cool)
It also has plenty of wonderful female characters. Barsine is one of my fav. Though it's still a long way to reach the point where we can see more of her.