This time, the "deliverer" Taiya Hando is carrying a bride, Mira Shifuto! After taking Mira out of the church, Taiya escapes from his pursuers and encounters the "Hashiryan," a large cosmic invasion force. Hashiryan's purpose is to collect humans' scream energy "Ghassolin". In order to protect people from the Hashiryan, Taiya changes into Bun Red and fights.

Mira has taken a request from a delivery guy. Her client is a boy she met at her part-time job. Mira is ordered by Taiya to complete the mission on her own and heads for the delivery destination with a bicycle.