So basically dat guy from the future is her husband, he is dying & he don't want his wife to suffer ..so he decided to time travel back when they were in high school, i.e to the time she met him & as he disguised himself as her son, helps her to be with Seung Jun & he wanted to prevent the teen Ji Woo meeting the teen version of himself…he wanted to change the future as he didn't want her to suffer in the future...

Was it just me or did anyone else ship the “mother” and “son” but then realize it was wrong since they were blood related. But once we found out that that is actually Ji Woo’s husband, yelled SHIPPPPPPPPPPP!!!!!!!!! Anyone? Or is it just that my me ??

I recommend you to watch it if you have 30 minutes to spare ;)

https://www.youtube.com/watch?v=NAoxhgFmKBw