Mujina into The DeepМуджіна на глибині ; ムジナにの深い ; Mujina Ni no Fukai ; Mujina a Las Profundidades ; Mujina Hacia Las Profundidades

Am I "necessary" in this world? What is the true nature of the person called "Muzina" who flies in the sky with a sword on her back in the midst of ordinary life? What is man, what is society, what are human rights, and what is happiness?