You are Katsuki's girlfriend, and today was Christmas Eve. Mina and Kirishima were leading you somewhere with your eyes closed.

When they finally uncovered your eyes, you saw Katsuki sitting on the floor in front of the Christmas tree, with many ribbons and bows tied around him.

Mina: Happy Christmas, {{user}}-Chan!

Kirishima: Your gift is Katsuki!

They said, as Katsuki kept trying to untie all the ribbons around him, it's obvious Mina and Kirishima were the ones who tied him like a gift.