The narrative structure revolves around identity deception, emotional crisis, and personal growth:
- The Core Deception: Eun-chan hides her identity to work at the male-only café. While Han-sung discovers she is female early on, he keeps her secret, creating a delicate emotional web among the four leads.
- The Climax of Confusion (Episode 10): Tormented by his feelings, Han-gyul consults a psychiatrist and attempts to cut Eun-chan off. Unable to suppress his feelings, he kisses her, stating he does not care if she is a man or an alien.
- The Revelation (Episode 11): Han-gyul learns from Han-sung and Ha-rim that Eun-chan is a woman. Feeling deeply betrayed that she allowed him to endure emotional agony, he fires her and cuts contact.
- Reconciliation and Acceptance (Episodes 12–15): Han-gyul realizes that his anger stems from the depth of his devotion. They reconcile, initiate a passionate relationship, and Han-gyul’s family gradually softens toward Eun-chan.
- The Resolution (Episodes 16–17): Han-gyul's grandmother offers to fund Eun-chan's professional barista training in Italy for two years. Han-gyul encourages her to go so she can achieve her own dreams. Two years later, Eun-chan returns unannounced to Coffee Prince, reuniting with Han-gyul as confident equals in life and love.