If Kagome and Sesshomaru got a lust potion in a fanfiction, it might start with confusion. They may not understand what's happening to them at first. Then, as the effects of the potion take hold, they could find themselves in situations where they are forced to interact in ways they never have before. Maybe they end up on a journey together to find an antidote, all while dealing with their new - found and unwanted desires. This could lead to some character development as they learn more about each other and themselves during this strange ordeal.
Well, if such a fanfiction existed, perhaps the lust potion could cause them to initially act out of character, with Kagome being more forward towards Sesshomaru and Sesshomaru having to struggle with these new, unexpected feelings. It could lead to a lot of internal conflict for Sesshomaru as he tries to maintain his usual stoic self.
I'm not sure if there is a specific fanfiction exactly about that. There are a lot of fanfictions in the Inuyasha fandom, but this particular concept might be a bit rare or not conform to the general tone of many fan works.
Perhaps Sesshomaru sees some value in Kagome. Maybe he realizes that she has certain powers or knowledge that could be useful to him in the future, so he decides to save her from Inuyasha.
One possible plot could be that Kagome discovers she's pregnant after an unexpected encounter with Sesshomaru. They then have to deal with the shock and the implications in a world where their relationship is not the norm. Sesshomaru might struggle with his new - found responsibilities while Kagome tries to adjust to the changes in her body and life.
One possible plot could be that Sesshomaru kidnaps Kagome because he believes she has some power or knowledge that could be useful to him. Maybe he thinks she can help him find a powerful weapon or a way to gain more territory. He might keep her in his lair and at first be very cold towards her, but as time passes, he starts to see her in a different light.
The plot could involve Kagome accidentally stumbling into Sesshomaru's territory. Maybe she's on a mission to find a powerful shard and his land holds a clue. This encounter could start a series of events where they initially clash due to their different natures - Kagome being warm - hearted and Sesshomaru being cold and aloof. But as the story progresses, they might start to understand each other better and form an unlikely alliance.
One possible plot could be that Pup Sesshomaru, in his own developing way, feels a strong connection to Kagome. He might start by protecting her from various threats in the feudal era. As time goes on, this protection could turn into a possessive claim over her, leading to a complex relationship dynamic where Kagome has to deal with her feelings for him and the situation she's in.
Perhaps the plot could involve the initial shock and confusion for both Kagome and Sesshomaru. They'd have to deal with the social and personal implications of this unexpected situation. Maybe they'd try to keep it a secret at first, but as the pregnancy progresses, it becomes harder to hide.
In the fanfiction, Hermione might face a lot of internal conflict. The lust potion could make her have unexpected feelings towards someone. Maybe she'll struggle to resist the effects of the potion and try to maintain her self - control. It could also lead to some interesting interactions with other characters as they notice her changed behavior.
In this fanfiction, it could be that the pups are in some sort of danger, like being hunted by a powerful demon. Kagome, with her spiritual powers and knowledge from her own world, steps in to save them. As she spends time with the pups, she starts to understand more about Sesshomaru through them. Maybe the pups are also curious about Kagome and her different scent and appearance. This encounter could also be a way to bridge the gap between Kagome's group and Sesshomaru, leading to new alliances or at least a truce in the ongoing battles in the feudal era.
One possible plot could be that Kagome and Sesshomaru initially struggle to accept their new situation. But as the pups grow, they see the importance of their family. The pups might have special powers that attract the wrong kind of attention, and they have to protect them.