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Mana Nagase is a high school girl from Hoshimi City who loves to sing. One live performance leads her to become a top idol and she starts to shine.
To-Y (Fujii To-ii) is a member of the punk rock band GASP. Along with other punk bands, which usually just hanged out doing small gigs, they have this enormous hatred and aversion to the main Japanese music industry, which is dominated by pop music and untalented Idol singers. However, To-Y was tempted by Kado (the Nagel ripoff) of Kama Production, a strong will promoter, to expand out beyond GASP since he has the talent, except she also expect to promote him as an Idol singer, which revolts To-Y.
Twelve-year-old Mitsuki Koyama is determined to become a singer, partially because of a promise she made to a long lost friend. Yet unfortunately, Mitsuki has a malignant tumor in her throat that causes her great pain when she uses her voice. In addition, her grandmother detests music and forbids Mitsuki to sing or talk loudly. One day, two Shinigami sneak into Mitsuki's room and accidentally tell her that she only has a year to live, prompting the now fearful and determined Mitsuki to head to the studio for an audition. While they intercept her for a second time, Mitsuki pleads for them to let her go; and seeing her determination, they decide to help her. To help fulfill her dream, Mitsuki's body is transformed into that of a sixteen year old girl - a body which nullifies her cancer as long as it remains intact. And so, Full Moon is born...
Follows two units, DRAMATIC STARS and HighxJoker, on their journey to the greatest stage!For various reasons, they aim to be top idols!