COME ON CHAHHAN

2006 Tokyo. The vocal 'Yuki Ehana', the bass 'Shiori Kato', and the drum 'Hitoko Murakami' of the three-member girl band 'Chahan' failed the audition for the continuation of the training contract of the affiliated office, and the president. If you don't sell out 500 CDs in stock from 'Yuichi Yanagishita' within 3 days, you will be sentenced to cancel the contract.
The three gathered at Hitoko's parents' ramen shop 'Satsumako' and held a reflection meeting, but when they noticed it, they had a quarrel. Taken by Hitoko's mother 'Yoshie Murakami', a beautiful mysterious man 'Ryo' comes in. Ryo talks with Yoshie intimately, but in fact he just got to know him. He had become friends with Yoshie with his amazing communicative competence.
Ryo says he was watching the performances of the three auditions, and he wouldn't sell 120 percent if left untouched. He also says he's come to produce three people from the future, and he'll also teach him how to sell 500 CDs within three days.
Yuki declines the suspicious man's offer, and she tries to sell the CD on her own, but she can't sell the CD at all. Ryo appears there, and she shows Yuki to prove that she is a future human being. Yuki promises Ryo that she will become a producer if she sells out 500 CDs in 3 days, and she cuts her finger. Ryo, who signed the contract, gave Yuki a secret plan to sell the CD ....