Why is this ending?

When I first watched it, I thought it was a story about a mature woman. She told about her previous life, about his lovelorn, and seeing a psychiatrist until she fell in love with the male lead. At the end, I found out that the director wanted to tell a story about a man. And at the end It seems that life has just begun. I feel that life is like this, full of hope. There are also many regrets. The boy's mother is very humorous. Uma has a good figure
. After going through so much, and then returning to that bed, why did they separate? However, when we met again after a year, why did I just smile and feel that when they returned to that bed again, they should not be separated.
In real life Is there such a thing? It's hard to imagine! It feels like the twist towards the finale is too commercial!

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