The residents of the Koprulu Sector thought they had finally achieved peace. They were wrong. Now, the Koprulu Alliance is faced with a galaxy that was bigger than they thought. They will meet new friends, and more importantly, new enemies, but all will be forced to put away their hatreds, both old and new, or none will survive the darkness that is to come...

After being berated by his friends for not understanding Rias's feeling, Issei almost goes berserk for thinking the wrong conclusion of his relationship with Rias till he was stopped by a cloaked man, who offered Issei an opportunity to live in a world he desires. But seeing the world he desired gone horribly wrong, Issei must do everything he can to back to the world he once knew.

After an accident during an IS training exercise, how will Ichika and co. deal with a very unHouki-like Houki? Especially a bold, aggressive, and suggestive Houki? Will Ichika's impenetrable wall of denseness be able to hold up against this new threat? Read and find out!