This is a trace left a long, long time ago by the Great Demon.
Now he's preparing for a transaction, and naturally wants to reclaim it, lest Su Mu, that madwoman, finds out and goes crazy.
"Finishing feels so good, being able to run around everywhere."
"Just wandering, taking a break, gathering material, and meeting people."
"I'll take a day off tomorrow and take you out for a stroll."
"No need, no need, I'm not even sure where I'll be tomorrow."
The Great Demon smiled and after thorough inquiries, confirmed that this person is busy like a dog every day, either attending school or writing, with no chance to meet any girls, he was at ease.
Because this person is exactly the one Su Mu is looking for.
The Great Demon had found him earlier.
Just hadn't found Su Mu, so finding this person was of no use.
He selected a suitable possession target from this person's social circle, making it convenient to meet, and also move around.
