Hoshikawa Taku, who traveled to Japan due to the sudden death of his black-hearted boss's "PUA", was bound to the [Black-hearted Agent System]. The more "black-hearted" he was to the girl idols he signed, the better rewards he could get. So... he signed Toyokawa Shoko with a black-hearted contract with no base salary and 90% profit sharing. He signed Hiroi Kikuri with a contract of "free food, accommodation and enough alcohol". He signed Takamatsu Tomo with the condition of "forming a band for life". He signed Hoshino Ai with a verbal contract of "teaching you what love is"... When they learned about the contract conditions, all the girl idols scolded him for being a black-hearted agent. But when Hoshikawa Taku pushed the contract in front of them, they signed the contract honestly one by one. There was no way, who made him offer conditions that they could not refuse... Hoshikawa Taku said: I am the one who lost money by signing with you, and every penny of hard-earned money I earned from you is what I deserve!