In the midsummer of his sophomore year in high school, 16-year-old Fu Nianchu met 17-year-old Lu Shi'an. I like that Fu Nianchu's heartbeat seemed to skip a beat when he first saw Lu Shi'an in a convenience store. I also like that when he looked back at Lu Shi'an on a rainy night, he knew how his heartbeat felt. But regrets are everywhere. They failed to receive God's blessing and could not live happily.
Unfortunately [your sentence "I'm sorry, let's break up" just made up for the missed moment when we first met] - Fu Nianchu
It's [the same rainy night, the same heartbeat feeling, the difference is that you didn't look back at me] - Lu Shi'an
The regret is [we fell in love with each other miserably, but we couldn't stay happy forever] - male and female protagonists together
Intention: Regret is the normal state of the world