A crossover could involve a character from Chicago Fire having a personal connection to a case the Chicago PD is working on. Maybe a firefighter's family member is wrongly accused of a crime. The firefighter then teams up with the PD detectives to clear their family member's name. This would bring in elements of loyalty, family, and the different skills of both groups. They could share information and resources to solve the mystery.
In Chicago, during the time of many fires, a love story unfolded. A fire investigator, David, and a journalist, Sarah, crossed paths. Sarah was covering the stories of the fires, and David was trying to find the causes. They worked together on some cases, sharing information. As they spent more time together, they discovered a deep connection. Their love story was intertwined with the drama and danger of the Chicago fires.
Most likely not. The idea of spanking in a fanfic related to 'Chicago Fire' seems to be inappropriate as it goes against the general themes of the show which are about heroism, rescue, and the camaraderie among the firefighters. It may also be considered offensive or at least not in line with the family - friendly nature that the show generally has.
One of the top stories could be about their heroic rescues during a major high - rise building fire. The firefighters showed great courage and skill in saving many lives.
I'm not entirely sure which 'Otis' in 'Chicago Fire' specifically you are referring to. There might be different characters named Otis in various stories. But generally, in a love story within the context of 'Chicago Fire', it could involve a firefighter named Otis falling in love with someone. Maybe it's a fellow firefighter, or someone from the community they serve. It could be a story of them meeting during a rescue operation, gradually getting to know each other, and then developing deep feelings over time.
I'm not entirely sure specifically as 'fanfic' can vary greatly. But generally in a 'Chicago Fire' fanfic, it might be about the characters from the 'Chicago Fire' show. However, the'spanking' part is rather odd and might be a very specific and perhaps unorthodox take on the characters' relationships or situations within the fan - created story.