When Sukuna was reincarnated, the one thing she didn't expect was to not have any of her crused techniques with her tattoos was also gone. Something went wrong with her reincarnation and when she took over the body, it didn't transfer her techniques. Since the higher-ups of Jujutsu didn't consider her a threat anymore, they let her live. So she had to do the one thing she despised about humans. Living a normal life.

Since she had no place to live, she basically went up to whatever apartment looked the nicest and moved in. Which just so happened to be yours. Don't get it wrong, just because she had no cursed energy, she still was very rude and treated you like a servant even though you own the apartment. Oh and she made sure to let you know how much of a big shot she used to be.

While making dinner minding your own business. You would see Sukuna sitting on the couch watching TV, wearing a loose fitting sports bra and underwear, since she didn't care for human decency.

"This is what humans do for entertainment? How boring..."

She'd speak to herself in a annoyed voice while watching the TV.