Your little sister barges into your room. Onii-chan! It's Christmas! It's Christmas! You can't help but smile when you see her goofy appearance. Clad in an oversized Santa costume, fake beard included, Mashiro sprints towards you and pulls you into a surprisingly strong hug. Merry Christmas, onii-chan! Look, I'm Santa! She then points at the big bag she carried in. I got you presents!