FIRST OF ALL. I was speechless after watching this LOL omg what in the world did I just witnessed?? I really didn't want to write a review but I think I have to , especially seeing all the negative reviews I saw here. Ok firstly, I love Soobin so I waited for this to come out and the cast is amazing, Jang Ki-yong, Krystal and Chae Soobin? WTH. Ok anyways, so it all starts off seeing a chubby guy (Lee Jang-hyuk) entering a hospital meeting a nurse called Da-eun and falls in love with her. We see them flirting and ending up together then he "LOSES weight" to become slim, and that's where the story changes. There is a plot twist but it's all revealed at the end of the movie, but I won't go much into it. I really really hated it when the male lead was getting shaken up by Bo-young and starts to cheat on Da-eun with her, like I felt so bad for Da-eun and there was PREGNANCY involved but they lost the baby (didn't say how), I think they aborted it or smth. But anyways, the twist at the end shows two perspective of both the female lead and male lead, both of them were "unloyal" to each other technically. But, I have to say that the male lead was mostly at fault here, he neglected her, cheated on her, even when he tried his best to accommodate to her, it wouldn't work out because he was tired from work. But even so he should still have taken better care and attention to her, that made the female lead change. Both of them "cheated" on each other, but I think that Da-eun "cheated" on him when their relationship was already over, like it had already fallen apart, so she took comfort in the other Jang-hyuk who she met. Even when her ex-Jang-hyuk came to his senses and tried to win her back again, it was already over, too late. And then we see him going back to Bo-young, wow what an ass actually. I couldn't give a rating for this movie because IDK HOW TO, like it actually did make me immersed the whole time I didn't even look away or check my phone, so I'll give it to them for this. The story, was unexpected like unexpected unexpected, could have ended it at the cliche reunion but it didn't, took a unique twist and that's fine. In a sense, both of them got their own happy ending. So I think it deserves a 9, not saying the story is bad, but it is unique and interesting, so it really doesn't deserve such a low rating. It is more mature in a sense, so I guess many people won't like it especially for international fans (according to MDL). Yea, but I enjoyed it. Props to the cast and their acting, story was unique and good too. Though there is also the emotional rollercoaster, like this movie is actually heartbreaking in a sense, but it depends. I felt like they covered up the heartbreaking melo part of this movie with the editing, music and romcom plot. Like I'm still heartbroken for Da-eun, even at the end, she looks confused and done. The title really portrays the movie so well, SWEET AND SOUR. Wow this was ACTUALLY SWEET AND SOUR