Min Hui woke up from the coma and she had forgotten his boyfriend , Jonghyun . Due to the accident occurs , Min Hui temporary lost her memories . However , Jonghyun does not give up and take care of Min Hui .

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After Minzy had lost her parents , she had been gloomy since then . She lives with Key , her childhood friend . But one day , Key introduced Jonghyun to Minzy . What had Minzy changed since she had met Jonghyun ?