Despite being disappointed that no one has mentioned his birthday, he tries hard to hide it. While he's feeling sorry for himself, he sees unit 401's cat on his mantle. He finds out that she is a wicked lady, who cares only for herself. After a day of doing things that would've been out of his nature in the past, he is shocked to return home to find a surprise party waiting for him. He realizes how much Soon Jin has changed him for the better.