Focusing on the crisis of the diaspora identity experienced by the three male characters in the drama “Mr. Sunshine”, this paper analyzes their inner cracks and the process of identity recovery through Winnicott’s object relations theory The characters in “Mr. Sunshine” all form ‘false self’ by experiencing the impossibility of belonging in the disconnection with their homeland (Joseon) and uneven relationship with the colonial ruling power. This collapse of self-esteem is not just a result of political and socio-cultural alienation, but also a psychological result arising from ontological deficiency and the absence of attachment objects. This paper theorizes through Winnicott’s object relations theory that diaspora identity can be extended not only to a problem of social position but also to a problem of psychological attachment and self-esteem formation, and narratively tracks the process of the three characters transitioning from false self to true self. In particular, through the narrative transformation of recognizing and practicing community ethics through the character of Go Ae-shin, overcoming inner deficiencies and moving toward one’s true self, this study seeks to reexamine the formation of a false self and the process of overcoming it experienced by diasporic subjects within the context of communal solidarity.