Juu Juuzawa, a rebellious delinquent, shuns companionship until Ame Ochibana asserts a supernatural bond between them spanning past lives. Initially resistant, Juu is perplexed by Ame's desire to serve him. When a classmate is killed, Juu suspects Ame's involvement but opts to keep her close for investigation. Surprisingly, Ame's intellect and abilities aid Juu in unraveling the mystery. Denpa-teki na Kanojo interlaces a tale of friendship, tragedy, and loyalty, showcasing that unexpected allies can emerge amidst chaos.