If I never knew you If I never felt this love I would have no inkling of How precious life could be And if I never held you I would never have a clue How at last I’d find in you The missing part of me

Shim Changmin has a simple wish, and that is to forget Summer. With this in mind, he hires an obscure firm claiming to be able to eradicate all memories of a certain person and let you live anew with the bliss of oblivion.    Is it possible to co