Spring is in full bloom, and the rein connecting Kurumi and Kaito has turned red. Kaito is in the midst of his mating season, and all human females are susceptible to his charms. Just as Kaito has been bewitched by her, Kurumi now finds herself bewitched by him! -- VIZ Media

Sad at the thought of spending Christmas alone, Kurumi Sagara goes out for a walk. While she’s crossing the street, a boy bumps into her, and a rein suddenly appears that binds them together. The overjoyed boy tells her she’s his master and that she’s a Santa Claus. Kurumi dismisses him as a crazy person, but then he transforms into a reindeer?! -- VIZ Media