- Protagonists had tough and vigorous pasts but they still have cool and calm personalities;
- Main heroines main role is to be protected but they also have their own moments to shine;
- Similar genres (Sci-Fi, Drama, Romance);
- Gets darker as the story progresses;
- Tons of comic relief scenes;
- Good artstyles and character designs;
- Supporting cast full of charismatic characters;
Both series are full of action and military themes and MCs doing undercover works, they start off pretty weak and generic but they become great tales as the story progresses.