Chu Chu Idol

One day Kensuke accidentally learned of the secret of Chiyu, a girl in the next class. It turns out Chiyu was actually the real identity of the popular idol named Chu-a Churam. Chiyu was kissed by a vampire, which caused their bodies to combine, and giving her the ability to transform.

After learning the secrete, Kensuke got bitten by Chiyu (whose body was being controlled by the vampire), and received a curse that prevents him from being separated from her. As a result, he began living with Chiyu, and her manager-intern.