What are some interesting plotlines in 'sebastian treats ciel like a baby fanfiction'?

One common theme is protection. Since Ciel is a baby in these fictions, Sebastian often takes on the role of a very protective figure, shielding Ciel from various threats.

In this fanfiction, it could be that a powerful force in the underworld wants to see what would happen if a human and a demon had a child. So, it manipulates events to make Ciel pregnant. Ciel and Sebastian would initially be shocked but then gradually accept the situation. The story could detail how Sebastian protects Ciel during the pregnancy, how they prepare for the baby's arrival, and how they raise the child in a world that is not so accepting of their unique family situation. It could also show the growth of their relationship as they face this new chapter in their lives together.

There's also 'Baby Ciel's Adventures with Sebastian'. In this fanfiction, it shows cute and innocent interactions between baby Ciel and Sebastian as they navigate the manor and deal with the other servants in a rather comical way. It's a light - hearted read that many fans enjoy.

One popular plotline is the reader being a new addition to the Phantomhive household. This could lead to both Sebastian and Ciel being intrigued by the reader. Another is the reader having some special power or ability that draws Sebastian and Ciel towards them. For example, the reader might be able to see the supernatural more clearly than others, which interests Sebastian as a demon, and Ciel as someone who often deals with the occult in his work. A third plotline could be the reader being from a different world or time, and having to adapt to the Victorian era where Ciel and Sebastian exist, while also dealing with their growing feelings for the two.

Maybe it's because of Sebastian's protective nature. He's bound to Ciel, and seeing Ciel as a vulnerable being, he might instinctively want to coddle him like a baby.

Another idea for a fanfiction is that female Ciel is kidnapped by a rival group, and Sebastian has to go on a rescue mission. Along the way, he discovers new aspects of her personality that he hadn't noticed before, and this changes their relationship dynamic as they face various challenges during the rescue.

Well, in non - lemon fanfic, Sebastian is often depicted as a sophisticated, powerful demon who is bound by contract to serve Ciel. Ciel is a young, determined noble with a dark past. But in lemon fanfic which is inappropriate, it may distort their characters in improper ways for the sake of adult - themed content. So it's better to focus on their proper character traits from the original source like Sebastian's loyalty (in a non - inappropriate sense) to the contract and Ciel's intelligence and drive to seek revenge.

Ciel would likely become more nurturing. He's used to being in a position of power and having to be tough, but with a baby, he'd soften up. Sebastian would have to suppress his more demonic tendencies. He couldn't be as cold - hearted as he usually is. His focus would shift from just serving Ciel to also protecting the new life.

One interesting story could be about Ciel and Sebastian going on a journey to a mysterious land where they encounter new challenges that test their relationship. In this fanfiction, they might have to face powerful enemies together and rely on each other more than ever.

One interesting fanfiction could be where Ciel and Sebastian's relationship is explored more deeply during the events of the Book of Circus. Maybe it delves into Ciel's inner thoughts and fears as he depends on Sebastian in that circus - themed chaos.