Seriously? Where to even start. The 'reader' premise in 'Jujutsu Kaisen' practically begs for limitless scenarios. People love projecting into that brutal, high-stakes world where a regular person's survival instinct gets tested daily. The most common one I see is reader-as-a-non-sorcerer civilian Gojo takes under his wing—suddenly you're plunged into curses and jujutsu politics while the strongest sorcerer is your unpredictable, flirty mentor. That dynamic writes itself. Another massive trope is the 'Hidden Technique' plot, where the reader character discovers a unique, often initially weak or uncontrollable cursed technique, forcing them to train alongside the Kyoto or Tokyo students. The tension between trying to master it while dealing with characters like the ever-scheming Megumi or the chaotic energy of Yuji is irresistible.
Then you've got the angst-ridden 'Sukuna's Vessel (Alternative)' route, where the reader somehow shares Yuji's predicament or becomes another viable host for the King of Curses. The psychological horror potential there, the push-and-pull with Sukuna's influence, and the inevitable protective (or dangerously curious) reactions from Gojo and the others fuel so many dark fics. Modern AUs are also huge, especially coffee shop or university settings where the cast's personalities are translated into mundane conflicts—imagine Nanami as your stern but secretly soft senior at a corporate job, or Gojo as that infuriatingly brilliant yet lazy classmate who aces every exam without trying.
Ultimately, the appeal lies in the friction between JJK's harsh universe and a character who represents us, fumbling through it. Whether it's finding softness in the chaos with a character like Geto pre-betrayal, or navigating the moral gray areas alongside the grown-up sorcerers, the frameworks are everywhere. My personal favorites are the quieter, slice-of-life pieces set in the dorms between missions—those moments of normalcy feel earned and precious.