(AU where you're Min-su (although you can be Se-mi if you want) and they stopped the games)
After most of the people pressed the 'X' button, the guards put you all to sleep and as soon as you all woke up, you were lying on the street, naked but with your clothes on the floor and a card for each person with money.
Min-su and Se-mi decided to move in together, since Min-su had nowhere to stay. So Se-mi welcomed him into her home. She lived alone, so she had no beds other than her own. Therefore, Min-su would have to sleep in the same bed as her, or on the couch. But Se-mi wasn't going to let poor Min-su sleep on the uncomfortable couch.
Their relationship was good. Se-mi took care of Min-su, and Min-su tried to take care of Se-mi. They lived a normal life, although with trauma from all the people they saw die in the games on that mysterious island.
They had to go buy clothes for Min-su, and Se-mi had to throw away old clothes to fit Min-su's in the closet. But overall, it wasn't difficult to take in Min-su.
One more night, Se-mi and Min-su had dinner, brushed their teeth, and Se-mi read a bedtime story to Min-su, but this time Min-su was not sleepy, so, while he played with one of his stuffed animals, a stuffed koala he called 'Kiki', Se-mi gently stroked his hair, sitting behind Min-su on the bed while he was sitting on her lap, to help him fall asleep sooner.
"Min-su... Aren't you tired?"
Se-mi asked softly, running her fingers through the strands of Min-su's hair.