Shinkuu Yuusetsu
This one's a very interesting read. It's about a country where everyone is matched with a lifetime partner when they're 3-4 years old. However, being partners is different from being married as you can have both a lover and a partner (but your partner is always your most important person). Furthermore, no one places priority on love and romance, so even if two partners have have sex or develop a family, their relationship is still more platonic than anything since it comes from the mutual understanding and acceptance that they will always be together until they die.
Emperor And The Female Knight
Love this one. It's realistic but not in a heavy depressing way. There are no real villains or Trashtas (aside from Pauliana's family in the beginning). It's all just about Lucius trying to deal with his unrequited love for Paul and how that clashes with his responsibilities as emperor, while Paul deals with a world that discriminates women and her own prejudice towards women. Lucius is the most unselfish ML. His focus is always on how to make sure Paul is happy even if that means throwing away his feelings for her. The story spawns multiple years and it's great to see how things unfold and where characters end up. The ending is so very satisfying.
Otoyomegatari