I Became The Youngest Member of Top Group Idol

As soon as they make a comeback, the members disappear like dust,
Popular idol group, Stardust, (self-proclaimed space dust)
A group that used to have seven members, but ends up with 4 members...
"No way, the new member is also awful?"
Even the maknae who was additionally recruited causes a huge accident. It would have been better if I had debuted instead of those troublemakers.
Get hit by the reincarnation truck and go back in time by eight years!
In this life, I will take that spot!