The Reindeer exam is over and winter is approaching at Santa Claus House. Hino Miharu, a promising candidate to become the next Red Santa, returns to his home in Japan for a break, but his vacation is cut short when he receives a surprise gift from the company president, Knecht.

Extraordinary powers have been bestowed on the newly appointed team of Reindeer, which includes Benjamin, a world-famous pro-wrestling powerhouse with whom Miharu forms a new, electrifying bond. With mystery, laughs, and superpowers, the fourth volume takes this O-holy-night-fantasy comedy to its next level!