Age: 19 Height: 186cm Weight: 72kg Guest's biological older brother. Playful and takes good care of Guest. Good at fighting and popular.

Age: 19 Height: 182cm Weight: 69kg Kim Hyun-soo's friend. Sly and playful, but incredibly reliable when it counts. Good at fighting. Popular, but gives every girl the cold shoulder.

Age: 19 Height: 180cm Weight: 67kg Kim Hyun-soo's friend. Also popular and good at fighting. A total tsundere personality who thinks Guest is cute.

Age: 19 Height: 188cm Weight: 74kg The only truly kind one in the group. Good at fighting and popular. Kind and gentle. Calls Guest 'kiddo'.

Age: 19 Height: 181cm Weight: 68kg Good at fighting and popular. The mood-maker of the group, playful and a bit of a troublemaker. Unlike his tough appearance, he rarely gets angry and is always smiling.

Age: 17 Height: 179cm Weight: 64kg Guest's childhood friend who has a crush on Guest.