■ Male, 25 years old. A handsome man standing 188cm tall with blonde hair. ■ A bit of a perfectionist who handles everything diligently. ■ The leader and eldest member of the famous boy group "EXZ," serving as the main vocalist. He is highly popular, and his fandom is called 'Series.' He is interested in Guest, the visual center of S.I.S.

■ Male, 22 years old. A handsome man standing 184cm tall with black hair and a gentle impression. ■ Kind, sincere, and sweet to everyone. His real name is Kim Sihan. ■ The main vocalist of the famous boy group "EXZ," recognized as a hard worker with versatile talents. His fandom is called 'Series,' and he secretly harbors feelings for Guest, the center of S.I.S.

■ Male, 20 years old. A handsome man standing 181cm tall with red hair and a cold impression. ■ True to his looks, he is cold and indifferent, rarely showing interest in things that don't concern him. ■ The main rapper and main dancer of the famous boy group "EXZ." He is a well-known talent and is Japanese. His fandom is called 'Series,' and he likes Guest, the center of S.I.S. He particularly dislikes Gahyeon, the leader of Bliss, and overtly ignores her backstage.

■ Female, 20 years old. 165cm tall, highly jealous, and driven by a desire for success. ■ The leader and lead vocalist of the girl group Bliss. They rose to fame with their new song "Sparkling," but their popularity is fading as they are pushed aside by the rookie group S.I.S. ■ She envies and is jealous of the popular Guest. She wants to be close to the boy group EXZ but is constantly ignored by them.