One possible plot could be that Ichigo is kidnapped by a powerful and unknown enemy. This enemy might be from a different realm or a secret organization within the Bleach universe. His friends then embark on a quest to find him. They might face various challenges and battles along the way as they try to track down Ichigo's location.
In an 'ichigo kurosaki kidnapped' fanfiction, perhaps he is kidnapped because of his unique powers. The kidnappers could be trying to use his power for their own evil purposes. Ichigo, while kidnapped, could be constantly fighting against their attempts to control or manipulate him. His friends, like Orihime and Chad, would use their own abilities to search for him, following any leads they can find, and they might even encounter some unexpected allies during their search.
Well, the fanfiction could start with Ichigo being lured into a trap and kidnapped. His captors might be after the Hollow within him. They could be some sort of mad scientists who want to study the Hollow - Ichigo combination. Meanwhile, his friends back in Karakura Town notice his sudden disappearance. Uryu, with his Quincy skills, starts to analyze the situation. Rukia, having a deep connection with Ichigo, might be able to sense some of his distress. They all come together, pooling their resources and knowledge, to rescue Ichigo from his captors who are holding him in a secret and heavily guarded location.
It could be a rogue Soul Reaper. Maybe someone who has turned against the Soul Society and sees Ichigo as a threat or a valuable asset. They might want to use his power to gain control over the Hollows or to overthrow the existing power structure in the Soul Society.
Well, it could be about Ichigo teaching Izuku some combat skills. Since Ichigo is a powerful Soul Reaper, he might show Izuku how to better use his physical strength and speed in battle.
One appeal is that it gives fans a chance to see Ichigo in new and unexpected situations. Since lemon fanfiction often involves romantic or steamy elements, it can show a different side of his character that we don't usually get to see in the main series.
In lemon fanfiction, Ichigo Kurosaki might be depicted with a different personality. Sometimes, authors explore his more emotional and vulnerable sides that might not be as prominent in the original work. For example, he could be shown in a romantic relationship where his protective nature is emphasized in a new way.
One idea could be that Ichigo has to hide his vampire nature from his friends at first. He struggles with the new instincts and powers, like enhanced speed and strength. Maybe he has to resist the urge to drink blood from his loved ones.
One idea could be Ichigo getting trapped in a virtual reality game world where he has to fight his way out using his Soul Reaper powers. Another could be a crossover where Ichigo teams up with other game characters to defeat a powerful in - game boss.
Well, a plot could involve Ichigo being turned into a vampire against his will. He then has to deal with the internal conflict of his human morals versus his new vampiric instincts. He might find that some of his friends are scared of him, while others are determined to help him find a way to reverse the transformation. And there could be a love interest who accepts him despite his new nature, adding a romantic sub - plot to the story.
One possibility could be that Ichigo is under some sort of mind - control. Maybe an enemy has found a way to manipulate his actions and he ends up hurting Rukia without meaning to. This could lead to a lot of internal conflict for Ichigo once he realizes what he has done.
One idea could be a crossover where Ichigo and Naruto are transported to a strange new world together. They have to combine their skills, like Ichigo's Zanpakuto abilities and Naruto's ninjutsu, to find a way back home.
Another fanfiction could be a story where Sakura, for some reason, is transported to the world of Bleach. She enrolls in the Soul Reaper academy, where she meets Ichigo. They start off as rivals, constantly competing in combat training and academics. But as time passes, they realize they have a lot in common and end up becoming good friends and allies.