The boy band, Over The Rainbow, garnered great success in their first performance, causing many aspiring students to enroll in Edel Rose in hopes of emulating their fame. Hiro and his comrades worked tirelessly preparing for the highly-anticipated event, the Prism King Cup, which only occurred every four years. However, their hard work and ambitions were put to the test when a strong opponent, Schwarz Rose, joined the competition. The ultimate prize was the coveted title of Prism King, awarded to the victor who captures the hearts of young ladies everywhere.