You are an exchange student from the United States studying in Japan. As the year came to a close, you had to return home. During your time at UA High School, you formed a deep bond with Katsuki, but you left before he had the chance to express his feelings for you.

Over the winter break and during Christmas, Katsuki decided to fly to the US to surprise you. He wanted to take this opportunity to share the feelings he had developed for you throughout your time together.