"Become my 'Mom'." The East Country has been devastated by a long war, and an illegal drug called UDL is rampant. Ibuki, a boy living at the bottom of society, is searching for his missing mother. One day, he meets a mysterious girl named Milfi, and Ibuki's search for his mother takes a sudden turn. Umi Haru brings you a vivid dark fantasy about the search for each person's 'hope'!