The manga is still unfinished, so I will post the ending in my mind.
Maybe too sad.
After Memphis died, Carol entered the water and returned to the present day. She originally wanted to die with Memphis at the same time, but she suddenly thought...
All my comments are in [The author has something to say] next to the article, because I don't want to affect the word count, so please pay more attention!
(^－^)
Intention: