What are the real names of the hero and heroine in the movie "The Ugly Girl" aka "The Trouble with Beauty"?

Comparison of the main characters and their roles in "The Ugly Woman Turns Around" Fat Woman Hanna/Kim Ah-jung Height: 170cm/Weight: 95kg Occupation: Stealth singer who sings for sexy singer Ami Part-time: Voice chatting on the phone that makes countless men's hearts flutter Hobby: Knitting a sweater for her crush, Sang-joon Habit: Sincerely saluting to thank those who appreciate it Hanna's dad is sent to a nursing home for his dementia and he needs to raise money for his dad's medical care. Hanna's father is sent to a nursing home because he has Alzheimer's disease, and Hanna has to raise money for her father's medical expenses. The only thing she enjoys is eating rice with her best friend Jung-min (Kim Hyun-sook). Hanna's wish is to give a big Korean salute to someone she wants to be grateful to, and also to be able to get love, it doesn't need to be much, just one person in the whole world needs to love her. Beauty Jenny/Kim Ah-jung Height: 170cm/Weight: 48kg Occupation: Rookie singer who appeared like a comet Habit: When looking in the mirror, she likes to look at herself from multiple angles Jenny, a beautiful singer who appeared like a comet, doesn't act like a beauty at all. Because she has an amazing appetite. She seems to be hiding some secrets behind every ridiculous move she makes. Sang-joon, the perfect man with a lot of charisma / Joo Jin-mo Sang-joon has his own unique vision and charisma. He knows the trends of the singing world like the back of his hand. But no one knows what he is thinking. When Hannah disappeared and Jenny appeared, everyone cheered but Sang-joon, who had no expression on his face. Rude Beauty Ami/ Seo Yoon Decorated She has a pretty face but not a bit of talent. The beauty also has a bad personality and always likes to make things difficult for others ignoring their existence. Seeing that Sang Joon is taking care of Hanna, Ami is very jealous and starts to make things difficult for Hanna. But with Hanna's sudden disappearance, Ami had to suspend her activities as a singer. What depresses her even more is the emergence of a beautiful singer, Jenny, in the singing world. In order to hold on to her position in the singing world, Ami starts secretly investigating Jenny's background. Hanna's Friend Jung-min/Kim Hyun-sook Hanna's best friend. He is in charge of the chorus in the concert with Hanna. Jung-min understands Hanna's troubles and sincerely shares all her joys and sorrows with her. However, he had problems with Hanna for various reasons, and even intentionally tried to screw Hanna, but made up with her after Hanna confessed. Naive Hanna's father / Im Hyun Sik has Alzheimer's disease and always treats Hanna as his wife, holding a Barbie he gave Hanna when she was a child. But suddenly one day on the TV to see the female singer Jenny's performance when Hanna's dad is very excited ...... Medical God Lee Engineering / Lee Han Wei Decorated With Hanna has a very subtle relationship, the appearance of the beautiful Jenny and he also has a very close relationship. As long as his wife is bathing days, he will definitely call outside. Usually loves women's mesh stockings. Hope to adopt it O(∩_∩)O thank you