crossposted on Ao3. Senku Ishigami lands in a world ruled by Quirks instead of science. Naturally, he starts breaking everything. Systems, tech, expectations. Now forcibly hired at U.A., he's bringing logic to a superpowered society that's never seen anything like him.

(𝗬/𝗡) (𝗟/𝗡), 𝘁𝗵𝗲 𝗶𝗺𝗺𝗼𝗿𝘁𝗮𝗹 𝗯𝗲𝗶𝗻𝗴 𝘄𝗵𝗼 𝗵𝗮𝘀 𝗹𝗶𝘃𝗲𝗱 𝗳𝗼𝗿 𝗼𝘃𝗲𝗿 𝗮 𝘁𝗵𝗼𝘂𝘀𝗮𝗻𝗱 𝘆𝗲𝗮𝗿𝘀. She bears no blade-only a wand as her weapon-finally reveals herself to the Demon Slayer Corps. "We've been waiting for your arrival... (Y/N)-sama." and for years, she has walked among the Demon Slayer Corps in secret, hiding her true identity behind the mask of a kakushi. She may appear gentle and unthreatening, but with a single flick, 𝗱𝗲𝗮𝘁𝗵 follows. 𝖵𝖺𝗋! 𝖣𝖾𝗆𝗈𝗇 𝖲𝗅𝖺𝗒𝖾𝗋 𝗑 𝖱𝖾𝖺𝖽𝖾𝗋 𝖨𝗇𝗌𝖾𝗋𝗍

"Why are you in my body?!" "If you're me... then who am I?" A single flash of lightning rewrites the laws of reality. Senku Ishigami, the genius scientist, and y/n - sharp, intuitive, and no stranger to challenge - find themselves trapped in each other's bodies after surviving a phenomenon no science can explain. As the world remains the same, their identities fracture, collide, and evolve. Logic meets instinct. Rationality clashes with emotion. And through it all, a deeper truth begins to spark beneath the surface... one not even science can quantify. Two souls, one storm, and a bond neither saw coming. >Things are pretty light until chapter 19 so that's where the warning comes. Started: 6 April 2025 Ended: 21 April 2025 ©Asuna_Luino

"You're kidding, right? You can't possibly think of sending me back in time." "Well, maybeee..." IN WHICH an insatiable mad scientist sent his beloved wife back in time to help his younger self rebuild humanity without a grain of explanation of his mischief. 13 July 2024 - 9 July 2025 ©Asuna_Luino

"I want to meet Mama." "You can't meet a dead person, Einstein." y/n Ishigami died giving birth to her second child but it didn't stop them from going to the past to see her again... and perhaps, find a way to keep her alive.

You don't know how or why, but you've been isekai'd into the world of Jujutsu Kaisen. Although your first instinct is to stay far away from the plot, you've been blessed with an abnormal amount of cursed energy, and for better or worse, you find yourself sucked into the storyline. You decide that you may as well use your newfound powers for the greater good, and if you're lucky, you might succeed in rewriting some of the characters' fates. But it turns out that your presence in this world is even bigger deal than you first thought, and soon, everyone wants to make you theirs.