The group's LIGHTSUM showed its overflowing talent and laughter in its first reality program and played an active role as an entertainment chick.

In the first episode of Mnet's new reality program "Do You Lightsum," which first aired on September 29th, LIGHTSUM showed off its eight-color charm.

On this day, Lightsum expressed excitement and expectations for the first reality through a preliminary meeting, giving off the powerful energy of rookie from the first shoot.

In the "Lightsum-Mer School" section, Seo Eun-kwang and Lee Min-hyuk from BTOB showed loyalty as teachers for the "Lightsum. During the self-introduction session, Cho-won's "Dance Manager," Yoojung's "Aegyo Captain," Jian's "Visual Youngest," Nayoung's "Entertainment Manager," Hwiyeon's "Fresh Fairy," Chowon's "Hackinssa," Hina's "First Love," and Sangah's "Girl Crush" drew attention.