Shougeki Gouraigan ~Hikaribito no Chikai~ was the title of the opening song in Amemiya Keita’s new project, Shougeki Gouraigan. It was also one of the few Tokusatsu opening songs to be performed by a female artiste. The song heavily emphasized that “Even if one swears to fight alone, a miracle can be called upon when five people work together,” which is a foreshadowing as well as a reference to the events in the series finale.