The fight has moved on to the next stage. A new plan is in motion... A new battle among the strongest warriors gathered across space and time has now begun!

First-grader Masaya is a crybaby despite his large stature, so he can't walk by himself on the dark path to school. The one who holds his hand is Akiyo, a tiny but capable second-grader. Masaya wants to be strong like Akiyo and admires her, but one day, something happens that leaves Akiyo in tears. To lift Akiyo's spirits, Masaya goes trekking to the distant Ipponsugi forest to find the spotted bellflowers that Akiyo loves.

Telegraph Pole Society, a mysterious group, is planning to conquer the world. The principal of the local high school forms a Defense Force by recruiting students from school: Shogi Morita, Kuho Tasuke, and Akiko Ifukube. Meanwhile the high school crazy scientist, Dr. Inogami, has turned a local boy, Kami Sanchin, into a cyborg. They might just defeat the Telegraph Pole Society with the help of the cyborg, or maybe not...

The unit Over The Rainbow succeeds in its debut. Aiming to become like the boy band, more students enroll in Edel Rose. Hiro and the others begin practice for the Prism King Cup, an event that is held once every four years. However, a rival called "Schwarz Rose" appears... Who will become the Prism King, the one who can make girls' hearts throb the most!?