Oh, my flaming !#$%!
This was basically a well-thought out thriller with overall consistency (minor glitches but nothing terribly horrible) right until the last 15 minutes or so (you know, after the time reset).
WTF?
WHY does that version of his MOM still remember anything? That's silly right there. WHY doesn't he see her resemblance to his MOTHER??? WHY does the ajusshi police chief not remember him? We saw the 2020 version of our detective disappear, but his teenage self went walking off with mama - so WHY IS THE HOUSE not theirs??? WHY doesn't the girl who loved him AT THAT TIME not remember who he is?????
AND for the love of all that's holy, were they REALLY trying to set him up with his MOTHER???? How sick!!! She's a genetic match for his mom! She IS his mom in fact! OMG!!!
This should have ended showing him with his mum AND dad, plus married to our newsreporter. With the Professor NOT remembering a damned thing!
Of course to be completely accurate, he should have totally disappeared as a HIGH SCHOOL kid, along with his mother, as they were walking to the convenience store. Plus the POLICE chief should have disappeared as well. But of course that would be sad, and I'm glad they didn't do it. However, I'm sorry. She's his MOTHER, and she KNOWS DAMNED WELL she is!!!!
Another KDrama ruined in the last 15 minutes, sadly. I'd tell EVERYBODY watching this to just stop watching as he disappears, with his younger self walking up the street with Mom. MUCH more satisfactory all the way around.