Castaway on the Moon - Characters & Cast

Initially motivated by despair and a desire to escape his life, his motivation shifts to survival. This is quickly replaced by a powerful, self-created purpose: to successfully cultivate, create, and consume a bowl of jajangmyeon. This small goal becomes the anchor for his entire existence and recovery.

Seong-geun begins as a hopeless and defeated man, pushed to suicide by societal and financial pressures. His accidental isolation forces him to move beyond despair towards self-reliance. He rediscovers the will to live not through a grand purpose, but through the simple goal of making noodles. He transitions from wanting to die to escape society to fiercely protecting his newfound, self-sufficient world from the intrusion of that same society. Ultimately, the connection he forms with Jung-yeon pulls him back, suggesting a future that integrates his newfound self-worth with human companionship.

Her primary motivation is to escape the real world, which she finds terrifying and judgmental. Her new motivation becomes the desire to connect with the man on the island. His existence gives her a focus outside of herself and inspires her to breach her self-imposed boundaries to maintain their unique bond.

Jung-yeon starts as a hikikomori, living a meticulously scheduled but stagnant life within the confines of her bedroom. Her world is virtual and entirely controlled. Observing Seong-geun, her 'alien', becomes a catalyst for change. She moves from passive observation to active communication, physically leaving her apartment to deliver messages. Her journey is one of immense courage, as she overcomes her crippling social anxiety step-by-step, culminating in her desperate run through the city to find Seong-geun, fully re-engaging with the world she had abandoned.