racing into the night meaning

Thanatos is the main antagonist of the Monogatary.com short story " An Invitation from Thanatos " and the music video for Yoasobi's "Yoru ni Kakeru (Racing into the Night)," based on said short story. They manifest as a girl in depression and a state of wanting to commit suicide to manipulate the protagonist into taking his own life. the love you give me ep 11