One day, Nagisa woke up feeling an immense sense of wrongness. Standing before the mirror was a stranger—or rather, a woman who bore a striking resemblance to his former self. Nagisa had contracted a rare, globally unrecognized condition known as Acquired Gender Transformation Disease. Can Nagisa find the strength to face his dreams again? And how will the relationship between these two change now that they are of opposite sexes? This is a story of the new daily life of Nagisa, struggling with his inner turmoil after the sudden change, and Guest, who supports him.