One interesting storyline could be about a young Inuyasha and Sesshomaru being forced to work together due to a common threat to their family. They might start off hating each other as they usually do, but as they face challenges, they gradually learn to respect each other's abilities.
In some fanfictions, there could be a story where baby Inuyasha and Sesshomaru are found by a kind-hearted human. The human tries to raise them together, and they have to adapt to the human world while still having their demon instincts. This could lead to many comical and heartwarming situations as they grow up under the human's care.
Another possible storyline is that there is a prophecy about baby Inuyasha and Sesshomaru. They are the key to either saving or destroying the demon world. This makes them the target of various forces, and they have to rely on each other's strength and the help of some unlikely allies to survive and figure out their role in the prophecy.
Sesshomaru would raise the baby with a combination of discipline and protection. He would protect the baby from any threats, using his powerful abilities. At the same time, he would discipline the baby when it made mistakes, teaching it the ways of the demon world. Inuyasha, on the other hand, would add a more carefree and emotional touch to the parenting, creating a balance in the baby's upbringing.
One common theme is family. Despite their often - antagonistic relationship in the original series, fanfictions like to explore how they could have a more positive family - like bond when Inuyasha is a baby. Another theme is redemption. Sesshomaru might be seen as redeeming himself from his past cold - hearted ways by taking care of Inuyasha.
There are also fanfictions that focus on their different powers and how they could combine or complement each other. For example, Inuyasha's Tessaiga and Sesshomaru's Bakusaiga could be used in tandem in a unique way in a story. And sometimes, there are love - interest - related storylines where their relationships with other characters are affected by their brotherly bond.
One popular 'sesshomaru and baby inuyasha fanfiction' might be 'The Unlikely Bond'. In it, Sesshomaru discovers baby Inuyasha and, instead of harming him as one might expect, he ends up protecting him. It's a really interesting take on their relationship.
There could also be a storyline where the baby has a special connection to the Shikon Jewel. Maybe the baby is born with a unique ability to sense the jewel's power or even has the power to purify it further. This could lead to many adventures as they try to keep the jewel safe from those who would misuse it.
One idea could be a story where a powerful magic affects both Sesshomaru and Inuyasha, causing them to be in a situation where they have to deal with the unexpected pregnancies. This could lead to them having to put aside their differences and work together to understand what's happening to them. Maybe they go on a journey to find a cure or a way to handle the situation, all while facing various challenges from other demons who see their condition as a sign of weakness.
One possible storyline could be a dark version where Sesshomaru is forced to protect Kagome in a world filled with malevolent spirits far more powerful than in the original story. Their relationship becomes a complex web of dependence and distrust as they struggle to survive.
One common theme is family. Since they are brothers, these fanfics often explore their family ties, like how their father's absence or presence affected them as babies. Another theme is rivalry. Even as babies, their different natures could lead to a sort of rivalry, which is often explored in these fanfics.
One popular 'baby Inuyasha and Sesshomaru fanfic' might be 'The Brothers' Beginnings'. It delves into their early days in a creative way, showing their relationship as it could have been when they were younger. Another could be 'Baby Steps for the Brothers' which focuses on their growth and how they interacted as children in a fictionalized setting.
One plot idea could be that Sesshomaru has to raise Inuyasha in a world where all the other demons are against them being together. He has to teach Inuyasha how to control his powers while also protecting him from various threats.