My favorite idol was tormented by vile sponsors until she completely fell apart.

When I opened my eyes, I had regressed eight years into the past—back to when she was just an agency trainee on the verge of being cut.

On top of that, my job title is the Head of Rookie Development, the man who holds the power of life and death over every trainee.

"If you want to debut, stay behind alone in the basement practice room tonight."

Armed with eight years of future knowledge and their deepest weaknesses, I began taming the future tier-1 goddesses into my personal females, starting from their trainee days.