Lee Jae-sang (35) - Starring Jung Ji-hoon

The best lawyer at JK Law Firm, one of the top 5 law firms in Korea
He has strikingly good looks and is stylish in suits. He lacks nothing, which people envy. He doesn’t even bat an eye when the judge, prosecutor and police come at him all at once. However, there is one person he can’t control his emotions in front of. It’s his first love lieutenant Ra Si On.
10 years ago, when he was at the Judicial Research and Training Institute, which felt like the desert, the first woman he fell in love with was like an oasis to him. However, she dumped him and didn’t even look back. One day, he gets into a car accident and he wakes up to find himself on a bed in a shabby house. In this world, he didn’t break up with Si On 10 years ago. They got married, have a spoiled kid, he is a respected prosecutor and is pathetic in many ways. When will he be able to go back? What kind of life does he have to live with a wife, impudent child and co-workers that look up to him?

Ra Si-on (33) -Starring Lim Ji-yeon

Only female lieutenant on the serious crime squad of Segyung Police Station
She is simpler and rougher than most men. Half the time, she has blood on her lips instead of lipstick, wears bruises instead of eye shadow, and smells like pain relief medicine instead of perfume. However, you’ll think of her differently when you see the tears and smile of this tough woman. It is usually hidden beneath her rough nature, but she is actually warm and innocent. After 10 years, ironically, her ex-boyfriend Jae Sang, who used to do everything he could to make her feel inferior, is fighting against her. When he regains consciousness, he desperately asks for Si On. However, she is full of hate and contempt, and is determined to tear him apart. The second part of their tragic relationship begins without her knowing how much Jae Sang loves her and the things he’s giving up to protect her.

☞ Si On in the other world
Si On in the other world is a bright, positive and energetic working mom. She is a good example of a woman that has people that love and support her. She has a family she can rely on, a husband that understands what she wants and principles she sticks to. These have shaped her into a bubbly and lively woman.
In the original world, Jae Sang gets beaten with a bouquet of flowers and dumped. In this world, he admits his mistake and offers Si On a heartfelt apology. The investigation is closed due to the pressure of Si On’s superiors, but their relationship is stronger and they start thinking about spending their future together. With the small salaries of civil servants, they get along as family at home and become amazing partners in investigations at work.
After Jae Sang crosses over to this world, problems arise because of the change in him. He is suddenly depressed about the tiny house they’ve been living in for the past decade. Nevertheless, Si On trusts Jae Sang and her love and trust end up changing Jae Sang!

Gu Dong-taek(36) – Starring Kwak Si-yang

Inspector, Serious crime squad
Si On’s partner, whom she likes and respects. He has bold, good looks that reflect his violent and taciturn personality. He met Si On as mentor and mentee when she was a senior in university and came to the police headquarters for training. He trains her hard to make her a good police officer. He gets angry at her when she gets hurt, gets stabbed with knives instead of her, and has a hard time distinguishing his feelings for her as a co-worker and women. When he realizes he is interested in her, they have already become like siblings and he can’t express it to her. He tries hard not to let Jae Sang, who finds out about his feelings for Si On before she does, get between them.