When he is reunited with his first love, a man who has lived alone for 20 years has to learn to care about others so he won’t be dumped by her again.

Hello Stella,

This is one of the most common subjects of novels and movies of every time, but I love it, and so many people do (the reason why this is one of ...).

"When reunited with his first love, a surly grouch must learn to care about others not to be dumped again."

:o)