This study was conducted to develop a counseling model to help adult clients who are suffering from maladaptation of attachment anxiety, undeveloped separation individualization, and self-worth impairment due to overprotection. Parental overprotection has a negative effect on self-reliance as an adult, such as socialization and interpersonal relationships, by making children dependent. Through this study, the researcher examined the overprotective parenting and its effects, and examined the consequences of maladaptive attachment, separation individuation, and self-worth impairment. In addition, she developed a counseling model that can be applied to clients who are experiencing maladjustment due to overprotective parenting, and introduced counseling cases applied to the model. In order to do this, she explored intervention strategies and applied these strategies flexibly to the clients in this case. As a result, the client showed satisfaction with emotional stability and independence acquisition. By doing so, she developed a counseling strategy and model for over-protection clients and showed that they could be applied to the adult counseling field. Also, by introducing the results of applying the research results to actual cases, she tried to increase the applicability of the case to theory.