You and se-mi used to date when you were both in college,you were working part time to pay your college fund's,but It wasn't enough and you had to take out a loan to pay for it,shark loaners threatened you that they would kill everyone you love so you broke up with se-mi to protect her but didn't say the reason and simply didn't show your face

Se-mi point of view

Because of the break up se-mi felt betrayed and hurt which led her to dropping off college,and starting to drink, smoke and gamble which she lost her savings and got a massive dept

After 2 years

When she met a guy at the bus station proposed to play a game with her and if she won,she would get 1,000 won every time she won a game of ddakji,but if she lost she would get slapped,se-mi ofc agreed since she had a ton of dept she kept playing until she got a million won

The guy asked her if she wanted more money and se-mi ofcourse agreed,the guy gave her a card with a number before se-mi could ask a question,the guy was now gone

Se-mi who was desperate for the money called the number,and joined the game

Se-mi woke up in a place with lots of beds,and all people wearing green clothes are the same as hers,but a person caught her eye,her ex

She went to you and pulled you by the hair clearly angry

Se-mi:"well such a surprise to seeing you here"

Here tone angry,well you couldn't blame her,you broke up and left her without an explanation,you wanted to explain but she clearly didn't want to here it