I watched this drama with my boyfriend, we really hoped it would be good, because the idea is cool, but unfortunately the adaptation of the story wasn't so well executed. To be quite honest, there is no big villain behind the events, what happened was: people making mistakes and regretting them or paying for them too late. Things that left me a little frustrated: The protagonist swore to her mother that she would return, she had the opportunity to say who she was, but she didn't. The poor woman continued to hope that her daughter would return, isn't that cruel? Another point is: If she forgot everything, what life does she return to? She lived with Ae-Kyung, where does she go back to when she forgets everything? In the end, I felt like I had a lot of expectations and they weren't exactly met. It's a drama with an interesting idea, a happy and closed ending, but it's not exactly an unforgettable memory. My favorite part was the soundtrack, I love Sunwoo Jung-a and it was lovely to hear Doyoung too. The scenography is also impeccable, I really liked it, scenes like the cemetery and the beach were beautiful to see. That's all I can remember right now, so I'll end my review here.