As Yuna and Polylina sing on stage, their performance is interrupted by a young girl named Ayako who is the youngest of the 3 Dark Sisters which are set on eliminating Yuna and her friends. Meanwhile her friends are battling the other 2 sisters and she visits them in the hospital after many were defeated. The next day as Yuna leaves for school, she notices the building was demolished and the nearby hospital is being attacked. Ayako is once again causing destruction and as Yuna's friends try to control the situation, Yuna takes matters into her own hands.