Folklore says that the soul of the deceased returns home on the seventh day, then completely dissipates and enters the next reincarnation. The seventh day is the deadline the world gives to the dead.
And Yu He asked Zhao Yang to come back at that moment.
The eighth day - this is not an extra day, it is a result that Yu He spent the rest of his life to get back from the rules, a result that should not exist.
From this moment on, every day Zhaoyang lives is not given to him by the world.
He lives, laughs, falls in love with someone else, and says the exact same vow to another person that he made back then. Yu He sat in the last row of the church and recited it silently in a voice that only he could hear.
He couldn't tell him that only if he remained silent forever, Zhao Yang could live on the eighth day forever.
Purpose: The rules say he will forget, but I will spend the rest of my life remembering it for him
