One interesting storyline could be Adam and Kono going undercover together. They might have to pretend to be a couple to infiltrate a criminal organization. This would lead to some tense and romantic moments as they balance their real feelings with the need to keep their cover.
Their relationship would likely become more protective. Adam would be constantly worried about Kono's well - being and that of the baby. He might be more overprotective than usual, which could sometimes cause friction between them as Kono is used to being independent. For example, he might not want her to go on dangerous missions.
They contribute by providing new and interesting character dynamics. Their relationship, whether it's platonic or romantic, gives fanfiction writers a lot to work with. Writers can explore different aspects of their personalities through their interactions.
There could be a fanfiction where Kono and Steve find out about the pregnancy in a very dramatic way. Maybe during a dangerous mission, Kono starts to feel unwell and later discovers she's pregnant. This could add a whole new layer of tension and emotion to their relationship.
One possible plot idea could be that Adam is initially overjoyed at the news of Kono's pregnancy. However, they soon face challenges as Kono's job in Hawaii Five - 0 might put her in dangerous situations. They could struggle with how to balance the safety of their unborn child and Kono's commitment to the team. Maybe they decide that Kono takes a temporary leave from the team, but she still tries to help from the sidelines, using her skills and knowledge to assist in investigations without being directly in harm's way.
A possible plot could be that Kono and Steve are trying to keep the pregnancy a secret from the bad guys they are investigating. They fear that the criminals might use Kono's pregnancy as a way to get to them. So they have to be extra careful in their daily lives and on missions.
In some fanfictions, when Kono gets shot, it often leads to a series of intense emotional and action - packed scenes. Her fellow team members might be filled with rage and determination to find the culprit. For example, they could start a manhunt across the island, leaving no stone unturned in their search for justice.
In such a fanfiction, there could be a lot of drama. For example, Steve might be overly protective of Kono during her pregnancy. And Kono could struggle with balancing her duties and her pregnancy. Also, their friends in the team would surely have different reactions and support them in various ways.
The wedding would be a big celebration with all their Five - 0 team members present. There would be lots of music and dancing. Hawaiian music would fill the air, and everyone would join in the hula. The food would be a mix of local Hawaiian delicacies and some of Steve and Kono's favorite dishes from their travels.
I'm not aware of any particularly popular ones. Fanfiction can be quite niche and vary widely in popularity. There may be some out there, but it might take some searching through various fanfiction websites to find.