Hello, My Twenties! — Ending Explained

In the Season 1 Finale, Ye-eun is kidnapped and abused by her ex-boyfriend Ko Doo-young; the roommates track her down and physically fight him off together. Jin-myung’s mother mercy-kills her vegetative son and takes the legal blame, freeing Jin-myung from her lifelong debt so she can travel to China. An autopsy confirms Eun-jae's father was not poisoned, freeing her from patricide guilt.

In the Season 2 Finale, an escaped convict holds the Belle Epoque roommates hostage until Ji-won de-escalates the crisis. Ji-won recovers childhood memories revealing that the mysterious pink letter was written by Moon Hyo-jin, an abused classmate who died by suicide. Ji-won testifies in court against the elementary art teacher responsible, securing justice. Jo Eun heals her family trauma, Ye-eun overcomes agoraphobia with Kwon Ho-chang, and Eun-jae finds closure after her breakup with Yoon Jong-yeol.

• The Reality of the Ghost: A supernatural reading interprets the entity as an actual spirit drawing death-adjacent guilt together, while the canonical psychological reading treats the ghost purely as a psychological mirror onto which each roommate projects repressed trauma.
• The Nature of Eun-jae’s Crime: Eun-jae’s belief that she poisoned her father demonstrates how trauma and childhood memory distortions lead survivors to blame themselves for tragedies beyond their control, verified when the autopsy reveals no poison.
• Foreshadowing of Ji-won’s Fate: Ji-won’s confirmed death in 2025 is interpreted as the culmination of her investigative morality, showing she could no longer live an unexamined life after confronting systemic injustice.