The last 15 pages of Chapter 85 show the aftermath:
However, the narrative pulls a cruel trick. In Chapter 82, a doctor tells Ha-nul that Si-joon’s brain activity is minimal. The infamous phrase appears: "Vegetative state with no hope of recovery." Si-joon’s estranged father arrives and immediately tries to pull the plug, demanding Ha-nul sign over custody of Do-yun in exchange for keeping Si-joon on life support. nan eomma nun appa ending spoiler