Responses

Basically, it involves the previous timeline where Moondae was still Gunwoo, Testar was Steer minus a few members, and all the scandals like the ones about both Sejins (bullying, drugs, etc.) actually made it past the first stage of just being rumors since no one was there to counter them.
In addition, this strife that the commenter referred to is about everyone's memories of the previous timeline and how it affected their personalities.
Wait why does it seems Raebin and the red hair(forgot their names) is in tension or bad mood? Did I miss something or shall I reread?