The song "Rooftop" by Unknown Brain describes the feeling of being lost and heartbroken after a breakup. The protagonist finds themselves on a rooftop, intoxicated, trying to escape the pain and emptiness they feel without their partner. They express their longing for what they once had, reflecting on the time they spent together and the effort they put into the relationship. The lyrics imply that the breakup was unexpected for the protagonist, as they mention buying a truck for their partner's father and feeling betrayed. They feel trapped in their emotions, with thoughts of their former partner constantly on their mind and their presence haunting them every day. The rooftop becomes a metaphor for their attempt to find solace and escape their sorrow by mentally reaching for the stars but ultimately realizing that their life feels incomplete without their loved one.