The song is about a guy who's about to propose to his girlfriend. His idea is to spray the words "marry me i love you" on the train his girlfriend rides daily, so he sneaks out at night to do so. He sprays the words on the door of the train, but he falls and he died. The morning comes and his girlfriend follows her routine of riding the train, not knowing he's dead. Someone tells her about a guy that slipped under the train and died, and when the train comes she reads the words "marry me i love you" and is suspicious the man that died might've been her boyfriend. So she calls him, and he doesn't pick up. That's basically when she realizes he's the guy that slipped under the train
The song is about a guy who's about to propose to his girlfriend. His idea is to spray the words "marry me i love you" on the train his girlfriend rides daily, so he sneaks out at night to do so. He sprays the words on the door of the train, but he falls and he died. The morning comes and his girlfriend follows her routine of riding the train, not knowing he's dead. Someone tells her about a guy that slipped under the train and died, and when the train comes she reads the words "marry me i love you" and is suspicious the man that died might've been her boyfriend. So she calls him, and he doesn't pick up. That's basically when she realizes he's the guy that slipped under the train