A plot twist could be that Inuyasha is forced to choose between Kagome and saving his friends. Some dark force could put his friends in danger and the only way to save them is to break off his marriage to Kagome. This would create a huge conflict for him as he loves Kagome but also values his friends deeply. Also, Kagome might come from a future where she is suddenly called back and has to find a way to either stay in the past with Inuyasha or go back to her own time, leaving him behind.
Perhaps a plot twist could be that there is a misunderstanding about their marriage. Some evil spirit could manipulate events so that Inuyasha and Kagome believe the other has betrayed them. For instance, it could make it seem like Inuyasha is still in love with Kikyo, which would deeply hurt Kagome. Or it could make Kagome look like she's been secretly working with an enemy of Inuyasha's. This would put their relationship to the test and they would have to work hard to clear up the misunderstanding.
Well, the plot might involve Kagome's family from the modern world coming to the feudal era for the wedding. Her mother could be a bit worried at first about Kagome getting married in such a different world, but then she sees how much Inuyasha loves her daughter. The story could show how Inuyasha tries his best to make Kagome happy during the wedding planning. He might go on a dangerous quest to find a rare flower that Kagome wants for her bouquet. And then, on the wedding day, they exchange vows in front of all their friends and family, promising to be together forever, and it's a really emotional and joyous occasion.
One possible plot twist could be that Kagome's pregnancy is not a normal one. Maybe there are some demonic elements involved due to Inuyasha's half - demon nature. For example, the baby might have some special powers that are not typical for a human - demon hybrid. This could lead to various challenges as they try to protect the unborn child from those who might want to use its power for their own gain.
One possible plot twist could be that Sesshomaru initially mistakes Kagome for someone else. Maybe he thinks she's a powerful priestess from his past. This could lead to an interesting dynamic where he's initially hostile but then realizes she's not who he thought. And it might change his view on humans in general as he gets to know Kagome better.
One possible plot twist could be that while drunk, Kagome accidentally reveals her true feelings for a certain character she has been hiding them from. For example, if she has a secret crush on Inuyasha, in her drunken state, she might blurt out something like 'I've always loved you' which could create a whole new dynamic in their relationship.
In some fanfictions, the plotline could focus on the political implications of their marriage. Inuyasha being a half - demon and Kagome being a powerful priestess, their union could change the power dynamics between the demon and human worlds. There could be groups in both worlds who oppose the marriage for different reasons. They would have to navigate through political intrigue, make alliances, and fight against those who want to tear them apart. And of course, there would be sweet moments of them just being in love and building their home together.
One possible plot twist could be that Kagome's pregnancy reveals some hidden powers or a special connection to the spiritual world. Maybe the unborn child has a unique ability that attracts the attention of both friends and foes. For example, it could be a key to opening a long - lost portal or have the power to purify a great evil that has been lurking in the shadows. Another twist might be that Inuyasha has to face his own insecurities about becoming a father more than he expected. He might worry that his half - demon nature could somehow affect the child, leading to some internal struggles and tense moments between him and Kagome.
Perhaps Ino's ex - boyfriend shows up and tries to win her back. This would create a lot of tension as Sai would have to fight for Ino's love and prove that he is the better choice for her. It could also make Ino re - evaluate her feelings for both men.
One plot twist could be that they face opposition from the Soul Society. Since Ichigo is a substitute Soul Reaper and Yoruichi has a complex history there, the elders might try to stop the marriage for political or traditional reasons.
One possible plot twist could be that their families, who initially opposed the marriage, suddenly come around due to an unexpected event. For example, a family member might fall ill and realize how much Mei and Yuzu love each other during the difficult time. Another plot twist could be that there's a misunderstanding that threatens to break up their marriage plans. Maybe someone spreads false rumors about one of them, but they eventually clear it up through honest communication. A third plot twist could be that a long - lost relative shows up and has some strange conditions or secrets related to their union.
A plot twist could be that Ayame is actually part of a prophecy related to Naruto. For example, their marriage is foretold to bring either great prosperity or great disaster to the Hidden Leaf Village. This makes their relationship more than just a love story and puts a lot of pressure on them, as they have to figure out how to fulfill the prophecy in a positive way.