Kurumi is going to be spending Christmas alone. The prospect disheartens her, but she bears it...until she bumps into a young man on the street and becomes irrevocably and literally tangled with him! It turns out the reins tied between them means that Kurumi is Kaito's master! And since Kaito is a reindeer, that means Kurumi is his...Santa!
Amai Kamiato is a separate one-shot at the end of the volume. Ren is a vampire and one day a girl comes to him claiming he is her father! But how can that be if vampires can't have children?