The story begins with Mima Kirigoe playing her final show
with the J-pop group known as "CHAM!” She decides to cross over into
acting after strong arguments by her office manager Tadokoro which comes with
stiff resistence by her personal manager Rumi. Mima is playing a small role on
the direct-to-video drama "Double Bind” which upsets many of her fans
particularly her stalker "Me-Mania.” Mima finds a website called
"Mima's Room" that has public diary entries that seem to be written
by her discussing her daily life in disturbing detail. Mima tries to tell Rumi
about it, but she says to ignore it.
Mima finally gets a leading role in "Double Bind,” but
she has to be a rape victim in a strip club. Rumi warns Mima that this will
ruin her reputation, but Mima accepts the part, though she remains indecisive.
The scene's atmosphere is so intense that Mima is traumatized to the point that
she can't differentiate reality from fantasy, or specifically her role in the
Several individuals who had a hand in tarnishing Mima's
reputation are murdered, the first being the delinquent from Mima's final show,
and Mima is considered the prime suspect. Mima begins doubting her own
innocence when she finds evidence of the murder and her mental instability
deteriorates even more. The faux diarist of "Mimi's Room” as well as the
serial killer, who believes herself to be the pop idol Mima, sets up Me-Mania
as a scapegoat for the killings.
Mima's mental instability becomes obvious as the story jumps
around from scenes from the tv drama to dreams to hallucinations of Mima's pop
idol form. She continually wakes up from various dreams. Mima can no longer
tell if something really happens or if its just another one of her dreams.
After the final shooting of "Double Bind” Mima is attacked by Me-Mania who
attempts to rape her. Mima knocks him unconscious with a hammer, and runs to
her final support left alive, Rumi.
Mima attempts to call Mr. Tadakoro but doesn't get an
answer. It is revealed that has been killed along with Me-Mania. When Mima
encounters Rumi she finds her wearing a replica of the dress she wore as a pop
idol. Rumi is shown to be the false diarest who believes that she is the real Mima,
and she is angry with the way Mima has been ruining the "real Mima's”
image. She decides to save Mima's pop idol image by killing all who attempt to
ruin her reputation. Rumi's final act is to remove Mima who she believes is an
imposter who is trying to ruin Mima. Mima manages to incapacitate Rumi after a
long chase through the city. Rumi is permanently deranged and institutionalized
while Mima grows from her experience as she moves on to her new life new found
confidence and independence.