It plays during some of the most "screwed up" endings, such as when Alphys disappears due to guilt or when Undyne vows to kill any human she sees. Perspectives on the Neutral Route
Many players argue that the Neutral endings are the most poignant because they feel the most personal and "specifically tailored" to how one actually played the game. Undertale OST: 081 - An Ending
Unlike the "True Pacifist" or "Genocide" endings, which offer clear closure, the Neutral Route endings—accompanied by this track—often leave the Underground in varying states of struggle, from political anarchy to characters mourning lost friends. It plays during some of the most "screwed