Miko grew up at the child nursing home. She has being trained to be a sister, but always fails. She was about to leave for Rome as apprenticeship when Mabuchi, the manager of the popular visual band group “A.N.JELL” visited the monastery. He asked Miko to singed the contract with the agency instead of Mio; Miko’s twin brother. Mio has been selected at a new member of “A.N.JELL” and needs to sign the paper, but he can’t show up at the office today. So Mabuchi wants to Miko to be in place of Mio only for today. Miko was taken to the office and signed the paper in front of Ando, the president of the agency. At that time, other members of “A.N.JELL” , Ren, Shu and Yuki came into the room and insist that they won’t accept if Miko (Mio’s ) as a new member if his singer skill is not enough. Ren forced Miko to sing in front of the member. She sings anthem and her voice is as an angel. Ando praises Miko’s voice. Miko is relieved that everything seems good and leaving for Rome. However, Mabuchi begs Miho to stay for 3 months as Mio. He confessed that Mio was involved in a fight and broke his nose. It will take three months to recover. Miko rejected this offer as first, but changed her mind after she hears that the reason why Mio wants to be a singer is because he is expects his mother who disappeared will find him once he become famous. Miko accepts to be a member of “A.N.JELL” in place of Mio. And her life as a “A.N.JELL” starts with other members. What will happen next? Can she survive among there beautiful boys?