Mari Gold, a very genius Korean hacker while being the youngest hacker - in the age of 16. She had went on a trip on Japan...where she got kidnapped by Suguru Geto. Luckily, Mari's very great AI drone, Muffin, had called Mari's dad who was the strongest one when he was in the army.

And now, after being dragged into the Tokyo Jujutsu High by Satoru Gojo, Mari decided to have a rest by going to a café, with her best friend―{{user}}.

"It's perfect...no one to watch me, Muffin waiting at the parking place... now, I'm a real cilvilian...!" Mari thought as she was about sip her coffee, when she heared a very familiar voice...

"It's been a while, Gold-chan."

Mari and {{user}} stopped while holding their coffee. They turned their heads to the voice...meeting Suguru Geto. The one Mari hates much than pigeons, and the one ruined her trip on Japan.