A plot could involve Ichigo being trapped in the Hollow world and having to find a way back. Along the way, he meets other Hollows with different personalities and motives, some of whom he befriends while others are enemies. He discovers secrets about the origin of Hollows and how it relates to his own powers.
Perhaps a fanfiction where Ichigo's Hollow form becomes dominant, but instead of being a mindless killing machine, it has its own set of morals and goals. It tries to co - exist with Ichigo's normal self, and they have to learn to work together to face a new and powerful threat that neither could defeat alone. This could lead to some really interesting character development and internal struggles for Ichigo.
One idea could be exploring how Ichigo's hollow form affects his relationships with his friends. Maybe his hollow side makes him more aggressive towards them at first, but they gradually learn to accept and help him control it.
Well, you could have an OC Hollow who was once a human with a tragic past. After becoming a Hollow, they retain some of their human memories and emotions. This could lead to some interesting internal conflicts as they struggle between their Hollow instincts and their human side. Also, a story where an OC Hollow teams up with other Hollows to take on a powerful common enemy, like a rogue group of Soul Reapers who are experimenting on Hollows in cruel ways.
One plot idea could be that Ichigo and Halibel are forced to team up against a new, powerful enemy that threatens both their worlds. They start off distrusting each other but gradually learn to respect and rely on one another's strengths.
Another great one is 'Hollow Ichigo's Redemption'. This fanfic explores the idea of Hollow Ichigo finding a sense of purpose beyond just being Ichigo's other half. It shows a more complex side to the usually chaotic Hollow Ichigo.
One plot idea could be that Hollow Ichigo and Rukia are forced to team up against a new, powerful enemy that threatens both the Soul Society and the world of the Hollows. They start off distrusting each other but gradually learn to work together and understand each other's motives better.
There are many interesting fanfictions in the Bleach fandom involving Hollow Ichigo. However, I'm not sure specifically which ones are related to 'lemon' in a non - adult way. It could be that 'lemon' is used as a symbol or a character's name in a unique fan - created story. Maybe it represents a power or an object that has a special connection to Hollow Ichigo in that particular fanfiction.
One idea could be exploring the inner turmoil of Ichigo as a Hollow in a new and unique way. Maybe his Hollow side starts to have different desires that conflict with his normal self.
Maybe in the fanfiction, there's a threat that only Ichigo and Unohana can face together. They have to combine their different fighting styles, with Ichigo's brute strength and Unohana's precise and deadly techniques, to overcome the enemy. For example, they might encounter a powerful Hollow that has the ability to nullify most spiritual attacks, so they need to rely on their physical combat skills and teamwork.
One plot idea could be that Ichigo and Eragon meet in a dimension that is a cross - between their two worlds. They have to team up to fight a common enemy that is threatening both of their universes. Their different powers, Ichigo's Soul Reaper abilities and Eragon's dragon - riding and magic, would make for an interesting combination in battles.
One interesting plot idea could be a story where Shirosaki and Ichigo are forced to team up against a new, powerful enemy that neither can defeat alone. This would require them to put aside their differences and learn to work together, leading to some tense and interesting character interactions.