You're F-Class, which is considered Genin.
Virus doesn't exist in Pandora.
Killer B is dead, long dead, leading to freed Gyuki. He was docile after the transition to Pandora, which was stated in the kingdom info.
SHINI CHIKAI brought the ninja world to Pandora with a Starfall.
The errors in the first paragraph show me how little of the lore you have grasped, or have read. It needs to be fixed, or you can wait for the next event at a chance for this to happen Via event.
(This was by no means an easy task, and should not be taken lightly. Please read the information with great attention.)