Polite and ever the gentleman, Seiya works as a Grand Warder at Hell Organization.
He performs his job flawlessly, but he is a hopeless romantic and a self-proclaimed weirdo.
He strongly dislikes Minami.
A year has passed since the heroine started working as a member of the H.O.'s enforcement squad.
One day, she is flagged during a mental evaluation. Without any idea why it happened, her mind begins to unravel. Seiya, however, seems to have an idea.
After ending her life, the heroine rides beside Seiya on a train bound for Hell.
Together, they look back on their married life.