Sequel to Unknown Trainee. Follows around Quill's little brother, Chan-Yeol as he goes through life as a K-pop Idol. He debuted in a group called Galaxy with 8 other members, 3 of them were good friends with the members of Gen10. Chan-Yeol and Quill often talk about flashbacks of when Gen10 was a group and talk a lot about the future that Chan-Yeol would like for Galaxy with his members. Galaxy was a group created through a Survival Show called Upon The Stars where 90 contestants competed. It was a collab show of Pledis and BigHit, so a Hybe Global Survival Show.