The Build Divers are about to transfer Sarah to the real world when the GBN system goes haywire, creating massive enemies that threaten the entire system. The Coalition and the GBN administrators then join forces with Build Divers and their friends to defeat them. After the battle, Sarah is at last sent to a Gunpla-like body in the real world, where she enjoys her new life with Riku and his friends. But true victory does not come without sacrifce. Riku will eventually give away his dream he started with to another since he wants to eventully live with Sarah as an unmarried couple! A certain former Avalon member is one who can achieve it.