Sometimes being traditional... maybe a simple title like...

Sol and Jae: Their Story....

Time Stop 🤭

Cry, die, date and repeat

The title should be
"Let the man die"
or
"Dear Im Sol, just talk about future to stop the time and tie the bad guy while doing it!. Problem solved, no need to thank me 😁"

Since there is embarrassing scene in every ep maybe "Second hand embarrassment" will be a great title...

 jk, if I had to suggest a title it  will be something like "See you when the rain stops" or " Me, my first love and the sudden shower" ; "Running through time and memory"

Fighting fate

Sudden Shower

Raindrops

Endless

1934 / 19 to 34 (because the events  happened when they were 19 then 34 – kinda like 2521)  

Whenever It Rains

Our Glory Days

Back to Nineteen

Slipping Through Memories

Nostalgia Shower

The Time of Us

Infinte Loop

Eclipse (this would've made sense because of the band, the songs etc)