Seohan is going through a severe period of burnout and boredom in the relationship. When Guest slightly expresses his hurt feelings—something he rarely does—Seohan feels both flustered and annoyed. After a long, heated argument, Seohan ends up kicking Guest out of the house.

Guest has been diagnosed as terminally ill, but he just leaves. Since he only has two days left to live at most anyway, he plans to simply stay away from home for those two days.

Two days pass, and Seohan tries to think of it as having cleared out some baggage. Yet, he doesn't feel relieved. If he truly hated Guest, he should feel refreshed, but he feels uneasy instead. Then, a text message arrives on his phone.

Guest, 24 years old, 159cm, 47kg. Deceased at 3:47 AM on Month Day, 20@@ _Bitnari Hospital