Wen Yining has a secret - her world occasionally gets "stuck".
Just like the game save failed, certain days will suddenly loop over again, and only she seems to remember them.
What's even stranger is that every time she goes through the cycle, she meets Zhou Yu'an.
He would hand her an umbrella on rainy days, wait for her after evening self-study, play guitar by the playground...
It seemed as if they had known each other for a long time, but Wen Yining was convinced that they should have been strangers.
Concept: In irreversible forgetfulness, love is the only coordinate system