This single, the fifth track, is an ambient electro piece that projects the psychology of growing up after the end of one's youth. It is also conceived like a manga work, adding an element of marine horror that evokes the tragic love between humans and the Siren of Greek mythology in today's world. This work also features Kasane Teto as the vocalist, and projects a fictional character's narration of a story of separation from various dreams and feelings that one has to let go of as one comes of age and becomes a member of society. An experimental work with a spatial atmosphere created by reverberant sound production, shimmering modulations, and vocal articulations with ambiguously altered Japanese pronunciations.