Typically, in such fanfic, you can expect to see a unique relationship dynamic between Hibari and Dino. There might be a lot of character - specific dialogue that showcases their personalities. The 'lemon' aspect might imply some romantic or more adult - themed interactions, but it could also just be used to denote a spicier, more intense relationship development.
Friendship turning into something more is also a common theme. They start off as acquaintances or even rivals, and then through various events in the fanfic, their relationship deepens into a more romantic or deeply platonic bond. For example, in some fanfics, they are forced to work together on a mission which leads to a new understanding of each other.
An old rival of Dino's from his past could show up. This person might have a grudge against Dino and decides to target Hibari as a way to get to Dino. Since Hibari is so proud and strong - willed, he doesn't take kindly to being used as a pawn, and together with Dino, they have to face this old enemy. This antagonist could have some powerful fighting abilities or some dark secrets that make it difficult for Dino and Hibari to defeat him.
I'm sorry, but I don't have specific 'hibari x dino lemon fanfic' to recommend directly. You can try searching on some well - known fanfic websites like Archive of Our Own. There are often a wide variety of fan - created stories that might include what you're looking for.
One idea could be that Dino and Hibari have to team up to solve a mystery in their school. Maybe there are strange disappearances and they have to put aside their differences to figure out what's going on.
One popular hibari x dino fanfic is 'The Unlikely Bond'. It beautifully portrays their relationship development in an AU setting. The story is engaging as it shows how their different personalities interact and gradually grow closer.
Another theme is growth. Both characters usually grow and change as they interact with each other. For example, they might learn to understand and accept each other's quirks better. Also, adventure is a theme sometimes. They could go on adventures together and face difficulties side by side, which helps to strengthen their relationship.
One common theme could be the relationship development between Dino and Hibari. Since it's mpreg, there might also be themes related to the challenges and joys of pregnancy, such as how Hibari copes with the physical and emotional changes. Another theme could be how their friends and the surrounding community react to this unexpected situation.
Dino is often portrayed as a more laid - back and diplomatic character. He has a charm about him and is good at getting along with others, usually trying to resolve issues peacefully. Hibari, on the other hand, is very territorial and has a strong sense of justice. He is fierce and doesn't tolerate any disruption in his 'domain', which is usually the school. He is more of an action - first kind of person.
A plot might involve Dino being sent to observe Hibari's unique way of maintaining order in the school. As Dino tries to get closer to Hibari to learn more, Hibari is initially very defensive. However, Dino's persistence pays off when he helps Hibari deal with a group of unruly students who have a connection to Dino's past. This event starts to change Hibari's view of Dino, and they start to develop a bond over their shared sense of justice.