Love of replica is a sequel to Mysterious love but the story is different just the leads and some support characters are similar.
It tells a story about this girl who loses her memory only to realise later that she isn't whom every one has been telling her she is and that she has some one identical to her( something like a twin)

So what did I think of love in the replica?

1. The amazing chemistry between the leads

Being their second project together, I must say their chemistry doubled and was quite sweeter and hotter than it was in mysterious love

2.THE CHARACTERS
Female lead won me over with how she could switch her attitude between the two identities as per the series it was some amazing acting displayed in her hand...
Male lead was amazing too,he wasn't the typical cold male lead type but had that charisma added to his character being a bodyguard
The supports did an amazing job with their characters as well

3.THE PLOT
Well I had my likes and dislikes about the plot...having watched mysterious love..I kinda expected this to be as thrilling as mysterious love was but it didn't quite meet the standards I sent on my side..it was a wonderful theme though..with a few plot twists that had me gasping and the way the story unfolded but it did have it's plot holes on my side and didn't quite keep me on my toes..but I managed to finish it so that proves that it was quite a good watch...at least I'd say I was entertained.
And I love how the epilogue hinted on there being an actual part two of MYSTERIOUS LOVE.

4.THE OSTS
The osts were beautiful and quite addictive

I repeat this was a sequel of mysterious love being that it was directed by the same person and had the same leads but the story was different so yes you can watch this without watching mysterious love first though I'd recommend you watch both since they are good