Owaru Sekai no Shuugaku Ryokou
終わるセカイの修学旅行
Two high school girls, one from Earth and one from Mars, form an unexpected bond as they travel together through space. The Earth is in a state of ruin, and the presence of Martians raises questions about their purpose. The two embark on a strange and enigmatic journey, uncovering the reasons behind their meeting and the circumstances that brought them together.