One week after the end of the TV anime
there was a Christmas special featuring the three main seiyuu,
Uesaka Sumire, Minase Inori, and Ogura Yui.
Sumire was wearing a reindeer head band, Inori and Yui were wearing santa hats.
At the beginning they did a kanpai with drinks.. but it wasn't alcohol.
They pulled out pieces of paper from a santa boot, which had some topics
about the anime.
They showed some clips from the anime, and they talked about the scenes.
For the second half of the show, they moved to a kitchen setting.
There was a contest by Inori and Yui to decorate a Christmas cake.
But the toppings were chosen from cards that they pull out.
There were several games, and the one who won each game got to pull
a card from the "good" toppings.
The loser of the game had to pull a card from the "bad" toppings.
At the end they each decorated the cake with the toppings that they got.
Yui won the cake decoration contest, so Inori had to eat her cake,
the one with more of the "bad" toppings.
But Yui and Sumire also ate Inori's cake.