Yes, there are likely fanfictions about Ichigo fighting Ulquiorra that are popular. 'Bleach' has a huge fan base, and the fight between Ichigo and Ulquiorra was a very significant moment in the series. Fans often create fanfictions based on such iconic battles, exploring different scenarios, character emotions, and outcomes that might not have been shown in the original anime or manga.
It's more likely to be fiction. Consider the physical and mental aspects involved in a fight. Physically, a fighter needs to be in top form in terms of strength, endurance, and agility. These are developed through training, proper nutrition, and rest. Mentally, they need focus, determination, and the ability to read their opponent. Sex doesn't contribute to any of these factors in a way that would be relevant to a fight. It's not like it would suddenly improve your punching power or your ability to dodge punches. And from a scientific perspective, there's no established biological or physiological mechanism that would make sex before a fight have any real impact on the fight itself.
No, it's most likely not a true story. Such titles often indicate a made-up tale with elements of fantasy or imagination to capture the holiday spirit.
Before a fight, there would usually be a lot of intense lines. Some of the common ones included:
Let me see how many of you are real warriors!
Who agrees and who disagrees? We want a duel!
I must win!
Don't talk to me about peace, or I'll let you know the consequences!
I'm ready. Now's the time to make a move!
I won't show any mercy. Once I make a move, I'll show no mercy!
There is no friendship between us, only interests!
Whoever makes me unhappy, I will make him even more unhappy!
I must get everything I want!
I'm tired of being bullied. It's time to stand up and protect myself!
Of course, this was only a part of it. In fact, the content of the lines before the fight in online novels was very rich. Different story backgrounds and characters would have different performances.
Rukia could be one. Since she has a close relationship with Ichigo, she might be shown cheering him on or even having some sort of role in the fight. Uryu could also be highlighted. He's a powerful Quincy and might have some unique insights or actions during the fight. Orihime, with her healing and shield - like abilities, could potentially play a role in protecting Ichigo or the others during the battle.
The main appeal is likely the expansion of the 'Bleach' universe. The fight between Ichigo and Ulquiorra was a key moment. In this fanfiction concept, with everyone watching, it can show the significance of the fight on a larger scale. It can also be used to develop minor characters who are just spectators in this scenario. Their reactions, thoughts, and any actions they might take because of the fight can make for an interesting read and add more complexity to the 'Bleach' world.