Return the slogan with an umbrella

My girlfriend was going on a long trip, so she gave me an umbrella when she left-I know what "umbrella" means.

In my heart, there has always been an unspeakable secret pain.

Finally, one day, it began to rain, and I thought of an umbrella when I was about to go out. After opening it, a line on the umbrella surface touched my sore spot instantly: why not lift it when it's time?