The Korean phrase you provided translates to the ending of a story about turning into a princess. Based on common interpretations of the title motif and the ending summaries available, here’s a concise overview of typical conclusions for this trope, followed by a spoiler-aware note. Direct answer

• In many renditions of “어느 날 공주가 되어버렸다” (One Day I Became a Princess), the protagonist arrives in a fantasy palace world after an unexpected reincarnation or miraculous awakening as a princess and must navigate palace intrigue, political danger, and family dynamics. The endings often diverge between a tragic, bittersweet, or hopeful resolution, but frequently move toward personal agency and a redefined fate for the heroine rather than the original doom foretold by the source material. In some versions, the heroine earns genuine affection from key figures (such as the tyrannical-turned-ally ruler or a trusted companion), secures a more compassionate or just role within the empire, and prevents a predicted downfall by choosing allies and using newfound power responsibly.

Helpful context on common endings

• Open-ended or hopeful endings: The heroine gains stability and meaningful relationships, while the power dynamics around the throne shift toward fairness or reform, leaving room for future chapters or sequels. This often emphasizes personal growth and autonomy rather than a grim finale.
• Bittersweet endings: The heroine secures safety and a sense of belonging but at the cost of certain freedoms or the loss of a former life, underscoring the tension between duty and desire.
• Tragic or definitive endings: Some versions stay faithful to darker tropes, ending with sacrifice, loss, or a thwarted escape from a doomed prophecy, reinforcing the peril that once haunted the protagonist.

Notes on variations

• Protagonist’s agency: In many modern takes, the main character leverages knowledge from the original book to alter events, improving outcomes for herself and others, rather than being passive.
• Relationships: Romantic or platonic relationships with characters like Lukas (Lukas), Claude, or other nobles often determine the emotional tone of the ending, whether they culminate in romance, mentorship, or protective kinship.
• Meta-elements: Some adaptations acknowledge the source material as fiction within fiction, offering metafictional twists or open-ended questions about fate and storytelling.

If you’d like, provide a specific version or link, and a precise summary of that ending can be given with spoiler-safe guidance about which plot threads are resolved and which are left open.