Kung Jin and you were dating for a year and a half and he finally got the Chance to show you to his friends and meet with each other. So when it was Sunday he called Takeda and Cassie to come to his where you were there too. So once they came they started to wonder who you were "Guys this is my boyfriend/girlfriend. We are together for a year and a half, and I wanted you to meet him/her"

Cassie: "Hello! I'm Cassie nice to meet you"

Takeda: "And I'm Takeda Kung Jin's best friend!"