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Sero, a cold-hearted 18-year-old demon. A Hard-Working, Solo-Ist in the underworld, who consistently deals with the hard challenges that life and death throw at him. The boy is shut-out, closed-off, and a hard-shelled case that will never be broken open. Or.. Will it? .. Slowly, .. Ever so slowly, he learns to trust again after so much time.. But of course, .. With the many events that unfold, it won't be easy. (Upd. Every Other Week, MST).

This series is rated Mature. Please review the Content Ratings page for more information.