The protagonist discovers that people around him lose something important every seven days. It may be a promise or an agreement. What's even weirder is that the protagonist's own memory seems to be missing a certain period of consecutive days, and he can't remember it no matter how hard he thinks about it.
The protagonist repeatedly finds the same mysterious mark that only he can see in the corner of his homework book, on the zipper of his school bag, and even on the back of his hand.
He met someone who was also looking for the truth, and the two formed a team through secret codes and tacit understanding. The process was full of temptations and crises of trust. It turns out that the so-called "forgetting" is a memory forcibly erased by the outside world; the protagonist's "ordinaryness" is actually burdened with some kind of mission or curse...
It was a forgotten week and the only light I had.
In this piece of ashes called "reality", I want to find my own temperature. Every seven days, the world restarts.
And I am the only loophole that has not been formatted.
Concept: Suspense and brain-burning