Most of the JJK Male Reader stories don't really catch my eye (no offence, I love some) so I'll make one that hopefully catches yours? Abilities are based off of Sun Wukong's from Journey To The West Season 1 : Done Season 2: Done Season 3 (Manga): Currently being written

He had never expected to be reborn in such a dangerous, cruel, and exciting world. Especially not in the body of Ryomen Sukuna. His plan in his new life was simple - become the strongest creature in Shinobi history. [Sukuna-SI in the world of Naruto]

What does it mean to be in second place? Some may argue that it signifies coming close to victory, having bested all but one. Others may see it as a perpetual shadow cast by the one who stands at the pinnacle. (Y/N) (L/N) answers this question as he's known as the Second Strongest Sorcerer of the Modern Era. He never liked this nickname because his dream was to be the Strongest... From his days as a student at Jujutsu High to his tenure as a respected teacher, he strived to achieve that title, however it was deemed impossible... After all, who could defeat Gojo Satoru? But who knows..? Maybe... Just maybe... That impossible might become possible.