The song "Hello / Goodbye" by Hardcore Superstar seems to be discussing the struggles of a toxic relationship or a friendship that has become detrimental to one's well-being. The lyrics suggest a farewell and a desire to end the connection. The opening lines "I said hello to you, my little sin; I said goodbye to you, my little friend" indicate that the relationship is both tempting, represented as a sin, and emotionally draining, hence the goodbye. The protagonist realizes that staying in this relationship is causing harm, as depicted in the line "I cannot feed my hunger inside this shell." This could imply feeling emotionally starved or being unable to grow and thrive within the confines of this connection. The phrase "Now I blow the whistle" symbolizes the protagonist's decision to take action and put an end to the toxic relationship. It represents speaking out against the negative aspects and moving towards liberation. The following lines express a sense of conflict and self-reflection. The lyrics question why the protagonist continues to hold onto the broken pieces when they are fully aware that it will only cause pain. The self-hatred mentioned might stem from not being able to break free from this cycle of toxic relationships or not being true to oneself. Overall, "Hello / Goodbye" seems to be about recognizing the damaging nature of a relationship, making the decision to break free from it, and questioning the reasons for holding onto something that brings only pain. It reflects the struggle of balancing desires and emotions while ultimately seeking freedom and happiness.