[1] Their stage name is a mix of Heechul's nickname "Universe Star" and Buzz's song "Coward".

[2] The song is a part of SM Station and is a collaboration single for the variety show Knowing Bros.[3] The song proved successful, topping the South Korean Gaon Digital Chart, an achievement known as "all-kill".

[4] The music video portrays Kim as a high school student who has a crush on Momo Hirai but she only has eyes for his best friend, who is played by Min.

The cast of Knowing Bros then come in and kidnap Momo, forcing Heechul and Kyung-hoon to learn martial arts from a master, who is played by Lee Soo-geun.

The music video presents LGBT issues to viewers in a lighthearted manner.