Narcissistic personality disorder is a psychiatric disorder characterised by excessive egotism and enormous desire for attention and admiration. Borderline personality disorder is a psychiatric disorder characterised by unstable emotional state and interpersonal relations, feeling of emptiness, identity disorders, impulsiveness and mood changes. Relationship complexity of two people, one with narcissistic and other with borderline personality disorder, can be described as a love dance and drama. Figuratively, a dance between a male narcissist and a female borderline represents an incessant spinning in the vicious circle around their immature defense mechanisms, which never comes to a conflict resolution. Psychotherapy of such a couple is very demanding because it needs deep understanding of these relationship complexities. Techniques used in psychotherapy have to be emotionally and creatively conducted. Bond with a therapist starts to be created in the waiting room during couple`s first visit. Therapy itself moves through three phases. The first phase is a state of oneness, where borderline lives within the mental space of the narcissist and the narcissit is turned towards his own real or imaginary accomplishments, talents and constant need to be admired. The second phase is awareness of twoness, transitional phase, in which the couple slowly experineces some changes in their thinking and behaviour. The third phase is the awareness of two emerging separate mental states. In this phase the couple realizes that they are two separate individuals, but still connected through emotions. High quality psychotherapy and a competent therapist play a very important role because they can change the life path of such a couple and get them out of a vicious circle full of bad feelings and relations.