Eunkwang loves each and everyone of the members of BTOB and is thankful to have met them. He has always thought they were his reason for happiness. And to say thank you for what they've done for him he's given them gifts on their birthdays. When Sungjae's birthday comes up, he has no idea what to get him. He asks the others what they'll be getting him to get ideas. He then remembers they'll be having a concert that day and decides to write a song for him. Not knowing what the leader got